benjyromig,
What firmware version are you running? Please ensure you have the latest one from our support site. Then reference the following FAQ on how to enable wireless. http://support.dlink.com/faq/view.asp?prod_id=2484
The FAQ I provided tells you how to setup WPA encryption. Follow how the image setup and the only thing you need to change for yourself is the SSID and the Pre-Shared Key.