suo file problem (clear case integration)

when opening a solution (.sln file) in MS Visual Studio Dot Net 2003, I get this message:

" MacPhyIntegration appears to be missing some required source control information. This can be caused by:-
Deleted or missing solution options file (.suo).
Opening a project from the local disk without its solution.
Adding a project controlled by a different source control database.
Opening the solution when source control is not available.

If Visual Studio is unable to recover the missing information for ClearCase, you may be prompted to browse for the location of MacPhyIntegration in source control. It is recommended that you complete this browse operation to keep source control working for MacPhyIntegration. However, if the location of MacPhyIntegration in source control cannot be determined or the browse operation is canceled or fails, you can use the Change Source Control dialog box to correct the problem. "

I'm using ClearCase for source control. the *.sln , *.vcproj and *.ccsc files are under source-control. the *.suo file is not.
can anyone say how to eliminate this message?

Sumit

.suo goes never under source control. It contains some local information and local settings related to .sln file. Althought it is slightly mysterious for me, but I discover one important trick: if anything goes wrong, delete the .suo file. It contains nothing which cannot be recreated.