Unable to do practicly anything in VB beta2

Hi there, I'm Ehud, first time here (kind of a newbie...)
I have a REALLY BIG problem with the VB beta 2 - since I installed it, I couldn't design forms or build my project (beta 1 projects or even a new form in a new project made in beta 2).
When I tried to build one of my recent beta 1 projects, it failed and showed me 11 warnings and errors.
When opening a form's designer, a critical messagebox appeared and said :"Could not load type 'Microsoft.VisualStudio.Shell.Interop.IVsRunningDocumentTable2' from assembly 'Microsoft.VisualStudio.Shell.Interop.8.0, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'." (for an image of this msgbox go to http://ewino.0catch.com/Screenshot.gif)
Does anybody know how to fix this bug/misunderstanding/something that stops me from completing a program?
please respond quickly, I'm on a deadline...Tongue Tied
thanx,
Ehud
[981 byte] By [Ewino] at [2008-2-26]
# 1
Could you try the clean up tool at Aaron's blog http://blogs.msdn.com/astebner/archive/2005/04/21/410573.aspx to clean up previous Framework?
You may have done this, please check to be sure Frameowrk was uninstalled last and all previous version of components uninstalled in the required order with
instructions at http://lab.msdn.microsoft.com/express/uninstall/ (non Express has different instructions)

DanVallejo at 2007-8-21 > top of Msdn Tech,Visual Studio Express Editions,Installing and Registering Visual Studio 2005 Express Editions...