error im****t sdo

Error : 0
Description : internal error 500.
Severity : 5
Source : System
Debug Info : N/A
Extra info : N/A
Client Source : ClmProgress::ProcessPackage
Recommended Action : N/A


I have this error when i try to im****t a .sdo, the .sdo is not big.

I have installed:

Windows 2003 standard edition.

I have the mime type ok 
and the access anonimous.

Thanks