Wap - Hp5880


I have a HP 5880 printer which I had installed and run successfully on an airport network with WEP security. This type of security however caused lots of problems with wintel pc settings to access the network, so I changed the security protocol to WAP. The PCs can now log in with a simple passowrd, but the HP has gone uncommunicative, and the network connection light is gone. Anyone got ideas how I get the 5880 back on a WAP protocol network?