problem with .net 4

This is explained in this discussion:
http://stackoverflow.com/questions/3267491/when-linking-a-net-2-0-managed-assembly-from-a-net-4-0-application-which-fram[^].
 
Please see the answer #4, first of all. It explains exactly the same very "additional configuration information".
 
This is the very non-trivial stuff related to the concept of in-process side-by-side execution.
 
For more background information, please see:
http://msdn.microsoft.com/en-us/library/w4atty68.aspx[^],
http://msdn.microsoft.com/en-us/library/ee518876.aspx[^],
http://msdn.microsoft.com/en-us/library/f4kkd0k5.aspx[^].
 

—SA