Please help! I originally had a bad window motor on the front driver's side window I replaced it and the window was working fine. Now all the sudden the window is stuck down again and will not go up or down. The driver's side window controls(buttons) are still working for all other windows. I do not know what the problem is now. I do not think it is the window regulator. What could be possible problems to check and possible solutions? Please help, thank you!