Power Window problem
 

Hellp. I have a 1992 325i sedan and the drivers side window came off its support. The back end of the glass raised higher than the front and the rear attachment to the window regulator came off the glass. I replaced the plastic sliders but the glass will not stay in the window guides. The back edge comes out slightly from the window guide and eventually, the rear support pops off. Can anyone help me solve this problem. Thanks.