Sounds like the cable guide broke. it's the white plastic piece at the bottom of the window regulator. If the motor's still running correctly all you need to do is go to a junk yard and get a new cable guide. You can probably get one from Ed Morad also but he's more into selling the whole regulator vs parting them out but he might have one that was bent and could sell you the guide. There's a writeup on how to reconnect the cable in the how to section once you get the part.