[Zope] DCOracle2 on NT4

I'm running into an Oracle error when running my python script using DCOracle2 on NT4, yet when I test it by hand in the interpreter it works fine. Using DCOracle2-1.1 on NT4/Apache, and here's the error reported: """dco2.DatabaseError: (12538, 'Error while trying to retrieve text for error ORA-12538')""" I've looked up the reason as being related to TNSNAMES.ora but why would the interpreter work and not the script? I have Perl scripts accessing it fine, so I don't think it's a User problem with Apache. Thanks, Sean