Cause
Network connectivity issues between IBM Cognos 8 BI server and SQL Server reporting database server.
Environment
Reporting database hosted on Microsoft SQL Server.
Resolving the problem
Scenario#1
Ask I.T. department's network admininstrator investigate and resolve network connectivity issues. One possible solution is to relocate database server on a closer (or the same) network subnet as Cognos 8 server.
Scenario#2
It is possible that other factors (such as the Windows 2003 SP1 SynAttackProtect protection) is causing this issue.