Itunes doesnt work after upgrade from 6 to 7

i've recently upgraded to itunes 7...and it wont open now..i've installed both quicktime and itunes..and i've checked that quicktime IS 7.1.3 which is compatible...and after i double click the itunes icon..i get a licence agreement..then i click agree..and right after that i get a error msg saying "the itunes application could not be opened. An unknown error occurred (-200).
anyone experienced this before or hav the solution??
many thanks
ken

I have seen that error message before,
What you will want to try is uninstalling Quicktime from Add remove Programs,
Open up My Computer, Browse to C:\Program Files\ and delete the Quicktime folder (There may be more than one)
Empty Recycle Bin and Restart
After the restart go to http://www.apple.com/quicktime/download/win.html and make sure that you select QuickTime 7.1.3 for Windows 2000/XP and download and install it.
That should take care of it.

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    2011-10-26 08:28:33+0200 [-] [txdav.common.datastore.util.UpgradeDatabaseSchemaService#warn] Beginning database schema check.
    2011-10-26 08:28:33+0200 [-] [txdav.common.datastore.util.UpgradeDatabaseSchemaService#warn] Required schema version: 3.
    2011-10-26 08:28:33+0200 [-] [txdav.common.datastore.util.UpgradeDatabaseSchemaService#warn] Actual schema version: 3.
    2011-10-26 08:28:33+0200 [-] [txdav.common.datastore.util.UpgradeDatabaseSchemaService#warn] Schema version check complete: no upgrade needed.
    2011-10-26 08:28:33+0200 [-] [txdav.common.datastore.util.UpgradeDatabaseSchemaService#warn] Database schema check complete, launching database service.
    2011-10-26 08:28:33+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Beginning filesystem -> database upgrade.
    2011-10-26 08:28:33+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-07B1-4733-AE89-8728D0C2CB4A'
    2011-10-26 08:28:34+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-5E85-4CC9-902A-A101164BD83F'
    2011-10-26 08:28:34+0200 [Uninitialized] [twistedcaldav.notify.NotificationClientFactory#error] Unable to connect to notification server: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionRefusedError'>: Connection was refused by other side: 61: Connection refused.
    2011-10-26 08:28:34+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-76C8-427C-AD0C-CB6D102C7D7F'
    2011-10-26 08:28:37+0200 [Uninitialized] [twistedcaldav.notify.NotificationClientFactory#error] Unable to connect to notification server: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionRefusedError'>: Connection was refused by other side: 61: Connection refused.
    2011-10-26 08:28:46+0200 [Uninitialized] [twistedcaldav.notify.NotificationClientFactory#error] Unable to connect to notification server: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionRefusedError'>: Connection was refused by other side: 61: Connection refused.
    2011-10-26 08:28:58+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-A847-4B8D-B810-CFE793F634CB'
    2011-10-26 08:28:59+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-6E96-4671-9BEB-FAABDB623EA3'
    2011-10-26 08:28:59+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-C56A-462D-90E0-D60285CCF751'
    2011-10-26 08:28:59+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-F13B-4233-A4E5-0055F0853881'
    2011-10-26 08:29:07+0200 [Uninitialized] [twistedcaldav.notify.NotificationClientFactory#error] Unable to connect to notification server: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionRefusedError'>: Connection was refused by other side: 61: Connection refused.
    2011-10-26 08:29:11+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-A2A9-4B21-8735-577F24ABA6D5'
    2011-10-26 08:29:11+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-7A55-4B63-AC42-43151A1F4810'
    2011-10-26 08:29:11+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-F38C-489D-88A2-42B5F47BB4AD'
    2011-10-26 08:29:11+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-A5E0-4526-B7F3-15DC2811E083'
    2011-10-26 08:29:12+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-97BE-43C3-94F7-A8C99AB92425'
    2011-10-26 08:29:12+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-9C74-412D-8DC0-69E3ED918CAD'
    2011-10-26 08:29:13+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-D6BD-450E-A8A1-708C063EF05F'
    2011-10-26 08:29:13+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-EC4C-43B6-A6A8-EA02F4024EB3'
    2011-10-26 08:29:14+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-1714-4C5B-85DF-0184DA8B3133'
    2011-10-26 08:29:15+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-CEC7-4E1A-9756-59DE5AF62E50'
    2011-10-26 08:29:26+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'XXXXXXXX-E113-470C-A824-0D988A8319FB'
    2011-10-26 08:29:30+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'wiki-XXXXXXXX'
    2011-10-26 08:29:32+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'wiki-XXXXXXXX'
    2011-10-26 08:29:32+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Migrating calendar UID 'wiki-XXXXXXXX'
    2011-10-26 08:29:33+0200 [-] Unhandled error in Deferred:
    2011-10-26 08:29:33+0200 [-] Unhandled Error
            Traceback (most recent call last):
              File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/twi sted/internet/defer.py", line 361, in callback
                self._startRunCallbacks(result)
              File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/twi sted/internet/defer.py", line 455, in _startRunCallbacks
                self._runCallbacks()
              File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/twi sted/internet/defer.py", line 542, in _runCallbacks
                current.result = callback(current.result, *args, **kw)
              File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/twi sted/internet/defer.py", line 1076, in gotResult
                _inlineCallbacks(r, g, deferred)
            --- <exception caught here> ---
              File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/twi sted/internet/defer.py", line 1020, in _inlineCallbacks
                result = g.send(result)
              File "/usr/share/caldavd/lib/python/txdav/common/datastore/util.py", line 146, in doMigration
                uid = fileHome.uid()
            exceptions.AttributeError: 'NoneType' object has no attribute 'uid'
    2011-10-26 08:30:13+0200 [Uninitialized] [twistedcaldav.notify.NotificationClientFactory#error] Unable to connect to notification server: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionRefusedError'>: Connection was refused by other side: 61: Connection refused.
    2011-10-26 08:33:19+0200 [Uninitialized] [twistedcaldav.notify.NotificationClientFactory#error] Unable to connect to notification server: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionRefusedError'>: Connection was refused by other side: 61: Connection refused.
    2011-10-26 08:42:07+0200 [Uninitialized] [twistedcaldav.notify.NotificationClientFactory#error] Unable to connect to notification server: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionRefusedError'>: Connection was refused by other side: 61: Connection refused.
    2011-10-26 09:06:13+0200 [Uninitialized] [twistedcaldav.notify.NotificationClientFactory#error] Unable to connect to notification server: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionRefusedError'>: Connection was refused by other side: 61: Connection refused.
    2011-10-26 09:44:28+0200 [-] Received SIGTERM, shutting down.
    2011-10-26 09:44:28+0200 [-] (UNIX Port '/var/run/caldavd-stats.sock' Closed)
    2011-10-26 09:44:28+0200 [-] (UNIX Port '/var/run/caldavd/caldavd.sock' Closed)
    2011-10-26 09:44:28+0200 [-] Main loop terminated.
    2011-10-26 09:44:29+0200 [-] Server Shut Down.
    2011-10-26 09:46:13+0200 [-] Log opened.
    2011-10-26 09:46:13+0200 [-] twistd 11.0.0 (/System/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/ Contents/MacOS/Python 2.7.1) starting up.
    2011-10-26 09:46:13+0200 [-] reactor class: twext.internet.kqreactor.KQueueReactor.
    2011-10-26 09:46:13+0200 [-] calendarserver.accesslog.AMPLoggingFactory starting on "'/var/run/caldavd/caldavd.sock'"
    2011-10-26 09:46:13+0200 [-] calendarserver.tap.caldav.CalDAVStatisticsServer starting on "'/var/run/caldavd-stats.sock'"
    2011-10-26 09:46:13+0200 [-] [txdav.common.datastore.util.UpgradeDatabaseSchemaService#warn] Beginning database schema check.
    2011-10-26 09:46:13+0200 [-] [txdav.common.datastore.util.UpgradeDatabaseSchemaService#warn] Required schema version: 3.
    2011-10-26 09:46:14+0200 [-] [txdav.common.datastore.util.UpgradeDatabaseSchemaService#warn] Actual schema version: 3.
    2011-10-26 09:46:14+0200 [-] [txdav.common.datastore.util.UpgradeDatabaseSchemaService#warn] Schema version check complete: no upgrade needed.
    2011-10-26 09:46:14+0200 [-] [txdav.common.datastore.util.UpgradeDatabaseSchemaService#warn] Database schema check complete, launching database service.
    2011-10-26 09:46:14+0200 [-] [txdav.common.datastore.util.UpgradeToDatabaseService#warn] Beginning filesystem -> database upgrade.
    2011-10-26 09:46:14+0200 [-] Unhandled error in Deferred:
    2011-10-26 09:46:14+0200 [-] Unhandled Error
            Traceback (most recent call last):
              File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/twi sted/application/service.py", line 184, in setServiceParent
                self.parent.addService(self)

    Just to let everybody know what I am trying at the moment:
    Found a thread where someone suggests to delete the postgresql-database:
    Detials in this thread https://discussions.apple.com/thread/3206720?start=0&tstart=0
    1. sudo serveradmin stop calendar addressbook
    2. copy old 10.6.8 calender data from backup ("../Library/CalendarServer/Documents/") to  /Library/Server/Calendar\ and\ Contacts/Documents/
    3. delete database: sudo dropdb -U _postgres caldav
    4. mv (if it exists)  /Library/Server/Calendar\ and\ Contacts/Documents/calendars-migrated to  /Library/Server/Calendar\ and\ Contacts/Documents/calendars-migrated-old
    5. sudo calendarserver_bootstrap_database
    6. now we start again: sudo serveradmin start calendar
    7. watch the log file - tail -f /var/log/caldavd/error.log
    And I get the same error as above but now I see a new one:
    2011-10-26 15:29:19+0200 [Uninitialized] [twistedcaldav.memcachepool.MemCacheClientFactory#error] MemCache connection failed: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionRefusedError'>: Connection was refused by other side: 61: Connection refused.
    Every help is welcome, bye
    Christoph

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