I managed to get in touch with Brian and he was very kind and helpful. He send me another plugin and now everything is working as it should. I don't know what was wrong yet, but here is all the info I had until now: http://board.homeseer.com/showthread.php?t=147566
The hardware is working now beautiful. Concerning the complains you had with the length of the cable: taking into consideration my setup and extensive testing, I think they are not realistic. Your hardware can support length much bigger than 10m using just 2 wires from a cat 5 cable.
I would be glad to answer any other question if you have.