Print Server

I have three machines connected to a D-Link Wireless Router, with 1 of the 3
machines hardwired. And I have just purchased a Airlink APSUSB1 USB 1.1
print server for connection to a Canon S400. When I set up the print server
everything seams ok, I can access it from any of the 3 computers; however, I
get errors when printing. I disconnected the printer and connected it
directly to one of the pc's to check its operability and its fine. All 3
machines are running XP - 2 with SP2 and the 3rd with XP original. The
print server communicates with the network utilizing the TCP-IP port and the
LPR protocol. Has anyone else experienced these difficulties. If so, please
advise what was your final resolution. Thanks.