I have an iMac (10.6) connected by USB to a printer. I am sharing that printer, and my laptop (also 10.6) used to be able to print through that (was correctly set up). Today however, the iMac is printing fine but when I try to print from the laptop, I see "Looking for printer. Printer is offline" - how do I troubleshoot this? How do I figure out what the problem is connecting to the iMac?