my rear window is stuck all the way down and when i try to use the power to bring it up I hear some type of crackling sound, like it is tryin to go up but nothin happens... I first thought that some how the window might of broke inside some how, but then i stick my fingers in i could feel the top of the glass and also there are no glass pieces in rear seat indicating that window is intact. Is this the common window regulator goin bad problem, or do you think its something else.