VS2005 & BI Calculations Tab

After installing MSSQL 2005 SP1 I now have a problem in my BI Projects.

Whever I open a cube in the designer and select the Calculations Tab, the mouse becomes an infinite hour glass as well as the words "loading..." in the center screen. I have forcefully terminate the IDE.

Has anyone come across this behavior and found a fix for a similar problem

Thanks,

-Troy