OK Guys,
1. You should have MS Silverlight SDK 2 beta 2.
2. Try to clean-up the browser's cache by deleting files.
3. Delete all the files named Gizmox.*.dll from the ASP.NET temporary folder:
"C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files"
In case this doesn't work, I will need you to look within the ClientBin and examine the packed ".xap" files more closely... More specifically I will need you to open each xap file (which is actually a zip file) and specify its contents: file names and the contents of the xml file AppManifest.xaml. You should be able to find each dll file name which is contained within the xap in the AppManifest.xaml.
I suspect that the system will not be there, please post in this thread the names of the dlls which you find within the xap files.
Regards,
Itzik Spitzen