DB connection in NT service app

Hi there,

I'm using a TService Application to connect to a Access DB via ODBC.
When i install the app it works just fine using (/install)
But when i start the Service application using the service control panel i
receive an internal NT error 2140

I wrote a small simple app, non Service. Connected to the DB and it worked
Can anybody explain what it is i'm doing wrong

Using NT 4 SP4
Delphi 5

Any help is appreciated
Tnx Rim