If you have a Firewall on the Windows PC it may be blocking access through the port your Mac is attempting to connect through.
That was my experience,
Udayan.
I just recently got a Mac for the first time. I tried adding a printer from the Windows network at home (connected to my brother's pc) when it asks for type of printer i use "generic" since the Lexmark x5250 wasn't on the list of available printers to add.
My problem is, it sends, as it does that "printing started" voice from the pc, but then on the macbook it quickly goes to no print jobs (the bar on the pc is saying 100% and printing complete) but nothing comes out of the printer
Help is appreciated, school is starting soon, gonna need to print.
Additional info: 13'' macbook trying to connect to Lexmark x5250 connected to a pc, which is shared (other additional pc's could print from it)

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