HP LaserJet 1022n Printer via Wireless LAN

Hi

I just got a new Printer: HP Laserjet 1022n.
Printing by Ethernet works just fine. Now i would like to print through W-LAN.
I habe e Router with 4 RJ45 Ports; i tried printing through our Network but the printer doesn't show in the Printer-List anymore.
I'm not sure where to beginn; this should be possible, right?

Thanks for your help!