When I tried had other error:
Thanks for your help.
Thanks for the screenshot.
Please reply to the new thread i created for you. this thread has already been closed.
This error is a known problem with Win2K8. This is a Microsoft problem.
When Win2K8 came out, they changed how DLLs are registered in the GAC. You must now use the commandline tool 'gacutils'. You can read more about it in MSDN.