This problem is really proving to be a tricky one (and quite annoying).
In SQL Server Management Studio 2008, up until a few days ago my IntelliSense was working great. Then all of a sudden it stopped. The icon as it as enabled on the toolbar menu, and under Tools -> Options -> Text Editor -> T-SQL -> IntelliSense it says it is enabled there.
I have tried refeshing the IntelliSense cache with Ctrl-Shft-R but that doesn't work either.
Any ideas what happened to my IntelliSense and what I need to do to get it back?