Strange Exception when using Entity Framework with SQLCE

I have used before EF 4 and SQLCE with no such problem.

While I have my assembly containing the edmx file and the context self tracking template and in another assembly the self tracking entities, I keep this strange compile error but the project compiles successfully...

Error   1   Error 175: The specified store provider cannot be found in the configuration, or is not valid.

This just dont go away....but the program runs.

Any idea?

Take a look at this question. Hope this helps.