IM003 when using ODBC

Hello,

Setup:
OS: Window XP Professional
ODBC Driver Version: Latest

The system has two user accounts.
    1) One is the administrator account.
        (I installed the ODBC driver under this account,
        placed the driver under the "System" Tab.)
    2) The other is just a "regular user" account.

Problem:
    Everything works fine under the Administrator account.
    However, under the "regular user" account I get the
    following error:
        "IM003"
        "Specified driver could not be loaded due to system
         error  998 (PostgreSQL)."

Thanks
Brian Erickson