I had a similar issue when reinstalling my glass, I could get them to partially go up and down, but would bind up big time at about the half way point. It turns out that I had the regulators on mine installed incorrectly. I don't remember exactly, but it seems to me there were two cutouts in the door that look like the regulator fits into. On my first attempt, of course I got it wrong. Seems like simple advice but you might want to take another look at this. Good luck.