[ADO] Database connection problem.

Problem!!! i am creating database connection using VC++ and SQL server
with authentication 'sa' and password "***". I am using ADO connetion
(with DSN).

I have two accounts on my computer system Administrator and Operator.
1- Administrator have full access on computer system.
2- Operator have limited access in computer system (can't perform
installation)

Well I can successfully connect with database from administrator
account.
Buttt when i try to run my application from operator account then then
database connection failed.

Would some body help me... Its urgent.

.