Now I know there is similar post in this forum, but it was back in 2009 and outcome is still unresolved. I'm stuck on this for few days and I'll be grateful if some one could help...!!! According to post below this is SSRS bug and I wonder if this has been fixed by Microsoft...? http://social.msdn.microsoft.com/Forums/en-US/sqlreportingservices/thread/9ec67d81-bd46-4b5d-8dfd-927b8e09173c I've a VM built with following configuration Window Server 2003 R2 x88 with SP2/ Domain Controller and with all relevant updates SQL Server 2008 Enterprise with SP2 and RS in Integrated Mode (I Installed and configure all the services on this server with AD account msdomain1/biService) I know SQL installation is not reccomended on domain controller, but this is my test environment to try things SharePoint 2007 Enterprise with SP2 (also configured using same domain account) Exchange Server 2007 to send/receive SharePoint access emails. Now everything is working fine, I can send and receive emails, add user to active directory, manage permission, design SSRS report using BIDS and then deploy these to SharePoint Report Centre site. However when I try to view these reports in report library I get the following error. An error occurred during client rendering. Execution 'l5s5gn45tg2r5v45a0ps2n55' cannot be found As it is mentioned in referened post, if i view the log file it says (msdomain1/biService) is not in database, BUT IT CLEARLY IS, since i install these services using this account. If you need more information regarding my configuration then please do let me know, any help to resolve this will be highly appreciated…!!! Many thanks Mustansar

A quick update, I did removed the Exchange Server from this Box. but i still get the same error, It looks like its not even gettin the change to connect to data source...!!! Any Ideas..........????????????Mustansar