Q: Problem detecting printer wirelessly

My macbook pro has stopped "detecting" my Lexmark pro208 printer. I can connect with a USB, but airport doesn't detect the printer wirelessly (anymore). I am running OS x 10.6.8. I can see the printer in "Bonjour", and other computers in my house can use the printer wirelessly, but not my MAC. When I go to Utilities and perform an Airport Utility scan, it doesn't detect the printer. So, I know the printer is on the network, but my MAC doesn't.