vCenter 4.1 on Server 2008 R2 ODBC Problems?
Dont forget when installing vCenter 4.1 on Server 2008 x64 R2 that you need the SQL Native Client drivers installed! Not there by default.
http://download.microsoft.com/download/4/4/D/44DBDE61-B385-4FC2-A67D-48053B8F9FAD/sqlncli_x64.msi