i have purchased my first mac (switched from pc), but i'm having troubles with my printer. the printer is an hp psc 950 (all-in-one) connected by usb. when i first set it up everything was fine - printed from different applications. then it stopped.... the job would be in the print queue, but it would not print. i received a communication error. this happened more and more, so i downloaded the updated driver (May '03) and installed. it was working fine again, but after a few jobs it stopped. any suggestions? thanks.