Anybody help me? My sunroof leaks on my passenger side.

It's not the weather stripping, as it's fine. Water comes in right where the headliner and the A piller connect, and soaks the seat, door panel, and floor.. I pulled off half of the headliner, and there is a 1/4" gap between the roof of the car, and the metal on the sunroof, but it's like this on both sides and the driver's side doesn't leak. I SLOWED down the leaking by checking the drain, turns out it was clogged. I got a air compressor and hooked it into the drain and all kinds of mud and crap flew out onto the bottom of my door.

The water drains better, but still leaks into my car whenever I make a left turn. Sounds like the water isn't draining fast enough. Help?