Printer Sharing

I posted this in another catagory, but it seems more appropriate here.

I could print OK from HP PC, running Vista Home Premium to my HP printer.
Then I decided to merge my home office (Mac and HP PC) to eliminate a
printer.
I set up a wireless Apple Airport Extreme with the Mac on wireless and the
PC on ethernet. I can access internet OK from each. The printer is
connected via USB to the Airport Extreme. I followed instructions on a
website for the PC setup for printer sharing. I can print to the printer
from the Mac, but not from my PC
The printer info from the control panel is Control Panel-Printers-hp
officejet 6100 series- Use Printer Offline. I am not sure what that means.

So I need help.

Train Man