Parallel-USB Printer Cable

We have currently purchased DELL Vostro 200 Slim Tower Computers in our office. I have problem connecting a Canon LBP800 printer to the computer. I have purchased a parallel to USB converting printer cable, but it’s not seem to be detecting the cable and also the printer. I have also tried choosing different ports as well, but still not working. The USB ports seem to be working fine. When I plug in the printer cable it says that “One of the USB devices attach to the computer has malfunctioned and windows does not recognize it.” Please help me… 🙁