Rear window problems

My rear window will go down but not back up.
Has anybody else had this problem? If so what was the issue?
Thanks in advance

 

I know on my 99 the rear windshield wiper motor has sometimes bound up on the rear window. You may be able to put some pressure on the windshield wiper arm to force it away from the window. You will have to have a second person to work the rear window button. You could also take off the back door cover and go about it that way as well.