I was just reading on linuxprinting.org anf found this:
Why can't I print when I'm using USB?
You're probably trying to print directly to /dev/usb/lp0, which won't work and tends to get this model into a bad state that can only be recovered from by power-cycling the device.

For CUPS, you'll print through the CUPS ptal backend, not the usb backend"
How do i configure this in Knoppix??? PLEASE HELP! Thanks, -Alex

*edit*LOL. Three posts in a minute. Anyway, I'm certain this is my problem, as whenever I try to print from Knoppix using the default configuration, it won't work in M$ Windows again until I power-cycle. *end edit*