This problem is because of JIT comilation..
http://support.microsoft.com/kb/917507
In the support, it is required some Mscorjit.dll ,s which only you can get directly from Microsoft,
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. Contact your local Microsoft office and get the patch.
Regards,
Imran
http://microsoftcrm3.blogspot.com