Connect to Printer on a Different Computer

I have 3 computers at my house. The printer (canon mp730) is connected to one of my roommates computer. I used to be able to connect to this printer through my wireless network on my old Vista laptop. Now that I have built a new win 7 desktop, i cannot seem to connect to this printer, i get an error saying it can't find the drivers.

I 'borrowed' the printer one day from my roommate to see if it was a win 7 compatibility issue, but it worked fine when i connected to the printer through usb. All the drivers installed fine and it printed a test page.

Any help on resolving this issue would be a great help. Thanks!

Just in case...Specs:

Intel i7-860
ASUS Maximus III Formula
ATI Radeon HD5870
8GB G.Skill Ripjaw DDR3 RAM
WD 300GB Velociraptor HD
WD 1TB Caviar Black HD
850TX Corsair PSU