Window Roll-up Module concerns

I installed a window module on a 92 GMC pick up and am getting bad results.  The drivers window works like a champ. Rolls all the way up every time. The passenger window is a different story. If it is all the way down. The unit doesnt even attempt to roll up the window. If the window is midway down, you get a little better results, but sometimes it stops about 2 in short. I have cleaned out the window tracks, and sprayed everything i can get to with WD-40. I have even tried splicing in a different location. I started at the drivers door, and moved the splice into the passenger window, but it didnt change the operations at all.

What truly baffles me is that  the drivers door works perfectly. I know I read somewhere on here about changing the resistor (to be honest that is a bit beyond my capabilities) Is that my only option? Or should I return the unit or what?

The window module is an AU-93 got it from autotoys. Thanks in advance to all those who reply

i know i read on some thread here about someone changing out the resistors...does anyone have any info on that..