My next problem is trying to get my front derailleur working. Everytime I try to shift it up, it goes over the chain ring and falls off. Sometimes when I shift down it drops between the two chain raings and gets jammed. I've taken the chain guard off to stop it getting jammed in there.

I've worked on the two tension screws to some success, but shifting up is still a problem. Either it falls off the edge (too far) or it takes 30-45 seconds after shifting up to latch onto the larger chain ring. There's no efficiency in it. I'm wondering if the mount is off - it looks as though it's not parellel with the chain, and off on a slight angle.

I know Sheldon Brown says maybe bending the inside edge of the cage out a little toward the frame can help, but I don't think that's going to help me here.

Any help please?