Still cannot connect to a printer with Vista

I have a USB printer (an HP DeskJet) that shared on my home network via one of the desktops (which is running XP). I had the same problem in Vista RC1 and it still exists in RC2. Whenever I try and connect to this printer it takes a long time and eventually I get the error below. Any ideas what the resolution for this is? Note, I can connect to network printers at work - these are directly on the network and not shared via a Desktop.