99 VT Calais V6 Supercharged, MIL & AirBag Light

[snoopin99]

Question for all of you out there, When i connect my MAX232 interface to my car there is no problem, even when i connect the pc to that, no problem. As soon as i start the macro in EFILive4, the MIL light, AirBag light & Trac Off lights come on, the Inst.Fuel usage screen stops and the temp gauge stops working. An "X" in a box also appears on the bottom right corner of the climate control screen & the thermo fan locks on, aircon does not work either. EFILive reads all the info correctly and functions fine (as much as the demo can function) But these things happen. Any ideas? I made the MAX232 box myself and it has no errors (checked it like 10 times over). This is crazy, is efilive sending a string to the ecu that it doesn't like? is there something i can try? Any help would be great as i want to hook this up for permanent use on an in-car PC setup.:nixweiss: :help2:

Thanks.
1999 VT Ser.1 Calais
V6 S/Charged Motor.