[Zope] Postgresql DB Connector and string problem

Hello everyone.... I've got the PoPy db adapter connected to a postgresql database, and I'm following the example in the zope book with psql rather than gadfly. I'm able to create the tables and such, but when I submit a query on the table with the two strings, I get an error: Z SQL Method at  /GradeBook/hire_employee Error, exceptions.NameError: string SQL used: Could not render the query template! Anyone know how I can correct this? Thanks! Russell