widow getting stuck

My driver side window keeps getting stuck when it goes up. it'll roll up about 2 inches, then it just gets stuck. I have to roll it down and up and down and up untill it budges. I already replaced the motor and regulator track (not cheap). has anyone else had this problem? any solutions?

My only one idea is something that happened to my honda accord. The track was fine, but the metal 'crossbeams' that were in the shape of an 'X' that raised and lowered the track had gotten bent, and therefore wasn't working properly. If you already know how to take apart your door, I'd check that out, and also make sure the window isn't off the track. Just take it apart and then run the window up and down a few times to see if you can diagnose it visually.