Global management group settings - reporting is grayed out

I installed RS on my SCOM 2007 server but reporting tab on navigation pane on left of SCOM is grayed out. Reinstalling SQL 2005 Reporting service did not help and below are the few links that help you guys

http://msdn.microsoft.com/en-us/library/bb677368(SQL.100).aspx

http://msdn.microsoft.com/en-us/library/ms143219(SQL.100).aspx

http://msdn.microsoft.com/en-us/library/ms143773(SQL.100).aspx

also attached is the document that might help you out.