Printing via AirPort Express w/ Windows 7

I just set up an AirPort Express as a print server on my wireless network. Setup was easy, everything went great... until I printed from a notebook running Windows 7. The document printed well, but printed again every minute or so... indefinitely. Even after I deleted the print job in the que it kept churning out copies. I have found posts from others with the same problem, but no definitive solutions. I tried some suggestions I found: unchecking the bidirectional support option, various settings in printer properties, etc., without success. Has anyone here experienced this and found a way to solve it?

Thanks