Guys: I having problems programming the MT(pre assembled and tested) and need some suggestions, help or both. I'm using a HP laptop with Vista, USB cable with female to female gender changer and a null modem. It uses comm port #5 which is set to 4800 baud with 8-n-1 set in the boxes. The antenna is attached and the gps is disconnected. When power is applied, the Micro Volt green LED comes on steady, the red and green MT LEDs initially illuminate, the green one flashes 3 times and goes dark. The red one comes on steady for a second or two, then off and then flashes once every 60 seconds or so. The computer can read the version but read/write fails with error code 128 32 or 33. At Sam's suggestion, I contacted Allen at VHS and he made several suggestions, all were tried, all failed to remedy the problem. I searched this forum and the Yahoo forum for error codes 128 32 or 33 and found that the most suspect was the computer, OS or USB cable, nothing definite, no good fixes. I leave on 29 Jun for a cross country trip to TN and convinced my wife that this unit was a good safety investment for the trip. Guys, I need some good suggestions/fixes really quick! Byonics is on vacation until 27 Jun. Also, does anyone know, for sure, which pinout from the Garmin GNS 300XL gps is needed for the MT. Thanks for replies, Dan.