Macs won't print to shared printer


We have a printer that is shared over a wireless network between macs and PCs. It has been working fine for 9 months, now all of the sudden none of the macs can print to the printer. It sees the printer and when I try to print from any application, the print status just says, "starting job" but it won't print. It just hangs on "starting job" indefinately. I don't know why this is happening. I've tried reinstalling print drivers and setting up the printer. Can anyone out there help? Thanks in advance.