I have a weird problem and I need urgent help.

When I try to open a from in 'design view' (ain't matter VB or C#, this
occurs in both...) I always get the error prompt shown below;

--------------------------------------------------------------
An error occured while loading the document . Fix the error and then try
loading the document again.
The error message follows:

File or assembly name EnvDTE , or one of its dependencies was not found
--------------------------------------------------------------

and I can't achieve anything further. No coding, no design, etc...

The platform I'm using is;

OS: MS W2K Professional SP 2
Programming Env: MS Visualn Studio.Net Beta 2