Facing Problem in DSN

Hi All,
 
I am creating a system DSN using PostgreSQL Unicode driver, after giving all the server credentials, when i am testing for the connection it is giving,  error message like
 
"odbcad32.exe has encountered a problem and needs to close. We are sorry for the inconvenience."
 
Can anybody please help me out.
 
Thanks in Advance........
 
Regards,
Itishree