Dynamixel Servo Library

Hallo, I have testet it, but my MX-28 do not run.

I have an arduino Uno and then the
http://www.dfrobot.com/index.php?route=product/product&product_id=579#.UKprORJ5PJP
Driver Board, but nothing happen wenn I start he sketch (serial Monitor).

I have pluged in 7.2V to the Driver Board.

Can anybody help me?

thx
druckgott