[Zope] Where the DB?

Hello people, let me bore you with a question: I'va installed the ODBC stuff, created a sample db with access 97 (test.mdb), selected to adda az odbc db connection, then the form appears, and whatever i write on it I obtain always "Invalid connection string: MS Access 97 Database". I think my problem is that Zope cannot see my test.mdb, in fact the "Select an ODBC Data Source" field is full of default text... Where should I put my archive? I've not been able to determine where the var "manage_ODBCDataSources" points at, is there anybody ggod-willed explaining this reference mechianism to me? TIA Max M