I just got a Subrurban, 88 I think. Its the one with the single window in the back that you roll down to open the tailgate. Anyway I noticed the window was off track so I fixed it. Now here is my issue. As soon as I tried to roll the window back up (Electric) it would not go up! I tried it down and its fine. It was not like that before. Could I have knock something loose? If so what? I don't have a clue what it could be. Any help would be GREATLY APPRECIATED!!