hey guys. I just recently got a cable for my 95 z to use with my hp 4400. I am hooking it up to the serial port on the back, but when I try to use freescan or cat, I am not getting any info. The cat program indicates error with cable, but this cable is brand new. I have the key in the on position with the car off, and have also tried it with the car running no info is coming in. I know my connector is ok, because my hypertech power programmer work as I hooked it up to check to see if the connector on car was bad. Any info will be greatly appreciated as I need to get this new tune in for my heads, cam