SSRS 2005 change datasource / Connection String

Hi All
I need to change the some shared data source on ssrs 2005 for the migration of some dbs.
Can I do it on tsql, I need to update the datasource / Connection String only for the reports that uses it.
How to change it on table : [ReportServer].[dbo].[DataSource] table. ?
Thanks a lot in advance.

It is not recommended to update records directly in Catalog table.
You can try
programmatic way to update that.
SSRS is webservice so you have to use something like below.
https://<<Report Server Name>>/ReportServer/ReportService2005.asmx
Make sure you do BACKUP database before doing any changes.
Regards,
Vishal Patel
Blog: http://vspatel.co.uk
Site: http://lehrity.com

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'=============================================================================
' File:      PublishSampleReports.rss
' Summary: Demonstrates a script that can be used with RS.exe to
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' Copyright (C) Microsoft Corporation. All rights reserved.
' This source code is intended only as a supplement to Microsoft
' Development Tools and/or on-line documentation. See these other
' materials for detailed information regarding Microsoft code samples.
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To run this I use:
rs -i GetPropertiesOfDataSources.rss -s
http://<reportserver_name>/reportserver > DataSources_<reportserver_name>.txt
But as I mentioned it is not picking up all of the data sources and I don't know why. I also don't know why it's so difficult to find all the data sources from within Report Manager. I'm new to SSRS but was told that prior to SQL 2005, this information was
easily available using Management Studio to connect to the report server but now it's buried in the Report Manager and not accessible from one spot. Bad move by Microsoft apparently. You'd think that there would be an easy way to find all of the data sources.
We need to migrate the SQL Servers on which reports are running, but we have tons of reports and, historically, little documentation for them so we need to be able to determine where all the data sources are so we know which to update. This is proving extremely
difficult. Your script helps but is not comprehensive.
Any and all help is appreciated.
Michael MacGregor, Senior SQL Server DBA, Carlson Marketing

Problem with Connection Manager. Can't change connection string / Server name

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Hi,
I have copied a number of SSID packages from a live server to my test server and am trying to get them up and running but I have a problem with the connection. The only thing that is different is the server name. I decided to keep the same connection in the connection manager as it is referenced in a dtsConfig file. I changed the dtsConfig file to reference the new servername [Data Source= new test server name]. I also check my paths and they are pointing to the correct config locations etc.
I found this post which was similar to my problem but I still get problems with the connection
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1319961&SiteID=1
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An OLE DB record is available.  Source: "Microsoft SQL Native Client"  Hresult: 0x80004005  Description: "Login timeout expired".
An OLE DB record is available.  Source: "Microsoft SQL Native Client"  Hresult: 0x80004005  Description: "An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections.".
An OLE DB record is available.  Source: "Microsoft SQL Native Client"  Hresult: 0x80004005  Description: "Named Pipes Provider: Could not open a connection to SQL Server [53]. ".
Error: 0xC020801C at Myprocess import from file, BuyAtReportsImport [79]: SSIS Error Code DTS_E_CANNOTACQUIRECONNECTIONFROMCONNECTIONMANAGER.  The AcquireConnection method call to the connection manager "myconnectionstring" failed with error code 0xC0202009.  There may be error messages posted before this with more information on why the AcquireConnection method call failed.
Error: 0xC0047017 at Myprocess import from file, DTS.Pipeline: component "ReportsImport" (79) failed validation and returned error code 0xC020801C.
Error: 0xC004700C at Myprocess import from file, DTS.Pipeline: One or more component failed validation.
Error: 0xC0024107 at Myprocess import from file: There were errors during task validation.
So even if I change the existing connection properties and save and Build my package again, my connection properties (connectionstring, servername etc) all revert back to its original data source when I re-open the package. Simply it does not seem to be saving the connection properties i put in.
What am I doing wrong or how can I change the existing connection manager to look at the new server. The database is the same and I have full admin privilege on the server.
I don't want to recreate my packages as there are alot and they are not simple.
After changing the connection properties, saving and reloading I get a connection error. But this is because it is not retaining the new connection manger setting i entered.
Incidentally - I created a new SSID to perform a simple connection and write to the the server and it was OK so there is no problem with actually seeing the my test server.
Thanks in advance

Yes, the package is in visual studio and I have executed it. There are no errors but in the output i have the error message about my connection. My dtsConfig file is added to the project in the 'Package Configuration Organizer' and path and files are correct. This is the output error:
Error: 0xC020801C at xx import from file, xxReportsImport [79]: SSIS Error Code DTS_E_CANNOTACQUIRECONNECTIONFROMCONNECTIONMANAGER. The AcquireConnection method call to the connection manager "myconnectionname" failed with error code 0xC0202009. There may be error messages posted before this with more information on why the AcquireConnection method call failed.
I will try and run it using dtexec.exe. if I have two config files do i use
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Best Regards,
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