Compilation error

Upgrading from 1.1 to asp.net 2 on a new server for http://shop.funkin-l.com/buy.aspx and every other aspx page gives

Server Error in '/' Application Compilation Error Description: Error compiling a resource required to service this request. Review your source file and modify it to fix this error.
Compiler Error Message: VBNC_CRASH: Visual Basic.Net Compiler version 0.0.0.5917 Copyright (C) 2004-2008 Rolf Bjarne Kvinge. All rights reserved. Error : VBNC99999: Unexpected error: The classes in the module cannot be loaded. at (wrapper managed-to-native) System.Reflection.Assembly:GetTypes (bool) at System.Reflection.Assembly.GetTypes () [0x00000] in /home/cpeasyapache/src/mono-2.6.7/mcs/class/corlib/System.Reflection/Assembly.cs:359 at vbnc.TypeManager.LoadReferencedTypes () [0x00028] in /home/ ...