All, I've been trying to get my pair of U-100 rotors under automatic control from a modified version of KO6TH AZ/EL Rotor Control program for a couple of months and have come up against a show stopper to get AZ/EL data from Orbitron on the serial port to load into a BS2. The BS2 loads programs and will display static data into a 2-line LCD display with no problem. It seems to be just the Wisp-DDE data is not recognized and stored. I have tried the original WispDDE and the Orbitron-Wispdde code AD5JN put out on the web but neither seem to work. I've disconnected the ATN line on the program-serial cable when trying receive data from the serial port but still no joy. I am sure this will work if I knew what I am doing wrong. Thanks for your attention, Gary AB3ID Snow Hill, MD