Can't Print to Shared USB Printer over Wireless Network

[Norouzi]

Ok, so I just bought a new 14" iBook (Sooooo Sweet) for my wife and we love it set up a wireless network which is great, there's nothing better than lying in bed and being able to surf the internet. Anyway, I want to be able to print to my HP Deskjet printer which is connected to my PowerMac G4 via USB. I've turned on Printer sharing on the Powermac and the iBook see's the printer and lists it in the Print Center, but if I try to print something the Print Dialog comes up but when I click the "Print" button nothing happens. The Print Dialog box doesn't go away and nothing prints. I can hit cancel and the Print Dialog box goes away. I feel like this should be easy so anyone got any sugestions? If it helps, I'm running 10.3 on the Powermac and the iBook is on 10.4. My network is set up through a Belkin wireless Router. I can connect the computers together fine over the wireless network. Thanks.