Error "502" in connection with iCal ?

When I swich to my session (we have 3 sessions on our Mac), I receive following message:
The server responded with error
The request for account "rogers.com" failed.
The server responde with "502" to operation
CalDAVAccountRefreshQueuebleOperation
After that I have to go "Online" to Sync with my other devices.  I am at loss as what to do about it.

im in the same boat. My regular internet is fine, fast as always and connected. No problem on another XP machine. but my vista is screwed. I have heard horror stories about iTunes and vista any advice people?? Apple? Because if they are not compatitatble im going to be extreamly disappointed. Any reply would be nice. Thanks!

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         (SERVER=DEDICATED)
         (SERVICE_NAME=imt_admin
         LISTENER_IMTADMIN=
         (ADDRESS_LIST=
         (ADDRESS = (PROTOCOL=TCP)(HOST=localhost.localdomain)(PORT=1522))
         (ADDRESS = (PROTOCOL=TCP)(HOST=localhost.localdomain)(PORT=1523))
         (ADDRESS = (PROTOCOL=TCP)(HOST=localhost.localdomain)(PORT=1521))
         ORCL=
         (DESCRIPTION=
         (ADDRESS = (PROTOCOL=TCP)(HOST=localhost.localdomain)(PORT=1523))
         (ADDRESS = (PROTOCOL=TCP)(HOST=localhost.localdomain)(PORT=1521))
         (CONNECT_DATA=
         (SERVER=DEDICATED)
         (SERVICE_NAME=orcl)
    I read from some forums that I need to edit somethings of which am not really sure cos i don't wanna mess with the database, I need help on what to.
    Thanks for help in advance.

    Use a single listener. There is no need for multiple listeners 99.9999% of the time.
    Have the listener bind the hostname as listening end-point - and not localhost.
    Localhost only allows local processes to connect via TCP. Which is questionable in most environments. Typically you would run clients on other h/w platforms (or VMs) - and this will use the database server's public IPs.
    Type hostname in the console to get the hostname of the server. If the network on that server is suspect (was not manually setup properly by someone knowing network basics), do not bother using the hostname. Use IP address +0.0.0.0+ instead.
    Update the listener.ora file. The LISTENER entry should look something as follows:
    LISTENER =
            (DESCRIPTION_LIST =
                    (DESCRIPTION =
                            (ADDRESS_LIST =(ADDRESS = (PROTOCOL = IPC)(KEY = EXTERNAL)))
                            (ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = <hostname-goes-here>)(PORT = 1521)))
            )You can also simply (and safely) remove/rename the listener.ora file - and start the listener with sane defaults.
    Next, use sqlplus (via the oracle o/s user) to logon as SYSDBA to the database. The database parameter of interest is LOCAL_LISTENER. It should be null (view it using the SQL*Plus command <i>show parameter</i>). If your listener port is 1521, then not a problem.
    If it is not, you need to update/set this parameter with the appropriate port number via the ALTER SYSTEM command.
    Once set/checked, manually instruct the database to register its services with the local listener, via the alter system register command in sqlplus.
    Check and confirm that the listener has received and successfully serviced that registration request by typing lsnrctl services in the oracle o/s console.
    PS. The reason for the error I think is that your are forcing the listener on localhost only - while the default/null local_listener parameter of the database instructs it to contact the listener on the default public IP address of that server. Which does not happen to be localhost IP 127.0.0.1.
    Edited by: Billy Verreynne on Jan 11, 2013 1:06 PM

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