running Windows XP Home & FireFox. my printer is connected via a USB port. when i try to print, the printer display shows 'receiving data', the printer icon on the monitor task bar disappears (as in the doc has printed) but i don't get a physical printed doc. i use PaperPort a lot so i switch back & forth between hard copies & virtual copies. the virtual copies aspect works fine, just can't get hard copies. i have tried disconnecting the power cord, didn't help. suggestions, please!