mmmmmmmm it shouldnt matter which usb port you choose they are all from the same hub usually , and if its usb you never should need to choose a port anyway
you may need to contact HP tech support , i hope thier more use than most :s
now thier site seems to be down...............
try their forums you never know your luck
http://forums11.itrc.hp.com/service/...73046+28353475