Sliding Door Frame Problem

I have a metal sliding glass door that has a problem.

The weather stripping on the left hand side (from the inside) began to come loose and fall out toward the outside, letting air in. I put some foam backer rod in there, but that soon became loose, so I put even more foam backing rod in.

I noticed that the metal frame of the door seems to be made of 4 pieces, one for each side and one for the bottom. I can push the left side closer to the right (sandwitching the glass) and that tightens up the gap. There are 4 screws on this left side piece of metal frame facing in toward the right side. two along the top, and two along the bottom. I tried pushing the left side in and tightening those screws but they don't seem to be attached to anything on the other side. I can crank away for many minutes and as soon as I relax the hold on keeping it tight, it loosens up again. Any advice? Do I need a new door?

I posted some photos of the screws, and the gap. You can see them here:

http://www.landbanana.com/1.jpg
http://www.landbanana.com/2.jpg
http://www.landbanana.com/3.jpg
http://www.landbanana.com/4.jpg

 

In looking at the problem, and the probable age of the door, I think it is time for a new door. It would cost money to have the door regasketed, and, in reality, what is to say, once it is fixed, what will happen next. If you make the decision to replace the door, let us know if you have questions, or problems, and we will walk you through the process, if needed. Good luck with the project.