After I first installed SQL 2008, I tried to connect to SSIS 2005, and to my surprise, received the error, “Connect to SSIS Service on machine xxx failed: Class not registered.” Thanks for the descriptive error message, Microsoft.
Apparently, you cannot connect to SSIS 2005 from within SSMS 2008. I found a feedback ticket with Microsoft that confirms the issue, though I wasn’t completely clear if they are planning on fixing it or not.
So, for those of you who installed SSMS 2008, make sure you keep SSMS 2005 installed as well if you still have SSIS 2005 packages out there…even if it is a pain to have to switch back and forth.
-A