Infrared code for k2 sonance keypad and directv hd

I have a home sound system that uses signals from a sonance k2 keypad. I just changed my receiver to a Directv HD DVR. I am trying to reprogram the keypads to work with the receiver but I don't have the remote control code in the controller options in the Sonance Navigator Program. Where can i find this and how do I get it into the Navigator Program so I can make the changes to my keypad. Thanks.