HELP! My drivers seat won't move back and forth!

[satern]

I have a 91 SL300. the drivers side power seat will not move back and forth. It move in all the other directions. I took out the bottom seat cushion and I can hear the module clicking when I hit the button on the door panel, but it wont move the seat. Any idea's?? Thanks

[cerbomark]

Is it possible something (like a dime or quarter) fell into the track??

[satern]

no, I can turn the screw drives that move the seat by hand. nothing is stuck, It seems like the motor just isnt getting the voltage the operate even though I can hear the contacts inside the black box evertime I hit the buttonl.