the drivers side power window won't go down. every other window works fine any suggestions????

Bad switch, motor, relay, fuse or wire. Most likely is a bad switch or motor. Actually think I saw a unit for sale on ebay the other day. Check out there maybe. If you know what your doing, you can get the door panel off and check to see if the switch and motor are getting power using a multimeter. If they are, you can narrow it to the motor or switch.