Hi, I'm new and I have a weird problem. Our network has been up and running smoothly for months. One Airport Extreme runs two Macs and two printers, a Brother HL-1435 and an HP Photosmart C4180, connected through a USB hub. This morning, both printers stopped working. Every time we try to print on either, the print dialog goes through, then the printer switches to "pause" and puts the job in a queue. Everything else in the network is working fine. I'm not sure where to start to fix this. Any suggestions? Thanks!