Hi I got 1995 Audi A6, I have a problem; my drivers power seat works but it doesn't move back or forward. NEED SOME ADVICE. HELP!!!

 

1 Could be bad switch. you can test it withg multimeter. Also check that the switch is getting 12v to it when ignition is on.
2 Could be bad motor (I assume it has at least two motors for each seat). Motor can be tested by connecting it to 12v battery.
3 Could be bad connection somewhere under the seat, check them all, make sure they are clean.