Another idea too... possibly might try switching your wireless security around to a WPA passphrase or something and see if it just doesn't like the WPS?
I've been lucky so far with my wireless printers and they connected with no major issues.
HP sucks... products are ok, but their support website and product support techs are idiots
“The two most important days in your life are the day you are born and the day you find out why.” —Mark Twain.