Sunroof Problem

I have a 1995 BMW M3. My problem is with the sunroof. I can tilt it up with out any problem, but I have to manually push back the inside sunroof liner. If I try to open it up fully, it hangs. Looks like it tries to open on the driver’s side, but the passenger’s side will not come down. I think it might have to be with the liner?????? Can anyone tell me what could be the problem/how to fix it? Also could anyone send me a link to the layout of the sunroof and how to take it a part to look it over?

Paul