Is the unit all the way in the cradle? My cradle seems to have two detents: a first one that fooled me into thinking the unit was connected, and then the second and actual one where the leads slid onto the contacts after applying considerably more force. The other rookie mistake I made was not realizing I had to push a button and turn the unit on while in the cradle. The display needs to read, "Host" in order to be recognized by the laptop.