I did finaly get my interface cable back from Ikarus today. It just took a long time to get it back, (I thought) but they did replace it. Rajul on the RCU / Aerofly fourm was a BIG help in finding the problem and yes we did call and talk to Ikarus before sending it back. Any way I am up and flying now but did want to put this info out there incase someone elce would run into this problem trying to get a new interface cable to work. I cant belive the cable I got was the only bad one.Thanks Steve