i dont have one of these devices.
So i dont know what happens in the various modes.

There are many possible problems, from the box using a different ip universe, to it outputting wierd artnet.

You might like to try sending me the hex and ascii dump of a packet sent by the device - if you can get such a thing.

I think the shareware program' interarchy' does udp packet dumps?

http://www.versiontracker.com/dyn/moreinfo/macosx/259