Error CGI /FastCGI error while login to server

Hi All,

I get an error message while login to Windows 2003 32bit server which has 12.1.RU3 installed

I have upgrade from 11.0.6005 to 12.1.RU3, Right from upgrade Iam getting the error message very oftenly.

When I downgrade back to 11.0.6005, I do not get the error message .  Again I Migrated to 12.1.RU3 and still getting the same error

Iam using SQL 2005 Which is not in the same server and tested the ODBC test.