trouble with HP 1320nw laserjet printer and WPA-PSK encryption

[Lovrenc]

Hi,
im having problems with settion up a wireless connection between my router and my HP 1320nw laserjet printer. When im trying to install im connection the printer to the wifi-router via the ethernet-cable. As I run the installationprogram I only succed when I use a WEP encryption on my router, then the program recognizes it and the installation finishes as it should and everythin works fine. But if I change the encrypyion type on my router to WPA and reinstall my printer in the same way as described above the installprogram wont find the WPA encryption (even though it has an option for it when installling) or it simply crashes telling my I that a major problem has occured. So the only thing to do for the moment is to change back to WEP encryption to make it funciotn wirelessly again, but I shure would like to know why the installation program doesnt accept WPA encryption.
OP: Win XP home ed.
WIFI-router:D-link 524