Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

 hi,
i got this error when i send mail through my site,
in localhost, i can able to send mail but when i check it on server, i get this error,
its run fine but when i test it today, i get this error, it work fine but today i get this error.
i use Interop.CDO.dll to send mail, 

Server Error in '/' Application.

Attempted to read or write protected memory. This is often an indication that other memory is corrupt.



Description: An
unhandled exception occurred during the execution of the current web
request. Please review the stack trace for more information about the
error and where it originated in the code.



Exception Details: System.AccessViolationException:
Attempted to read or write protected memory. This is often an
indica ...