I had this same problem with 1.4 and 1.5 and I had fixed it a while back. However, I can't seem to figure out what the issue is with 1.6. I can get the applet to load just fine, but when I click on the receiver (left) and try to click on the "Player" tab, it highlights but nothing is changing. I can see the IP, MAC, and the name I gave it, too.

Clues?