HELP! Windows won't roll up!

[ercc]

I have a 99 Boxster with some very minor modifications including a replacement glass top which has been on for about a year now.

In the last 3 or 4 months when I put the top up the windows refuse to roll all the way up. This happen speratically and if I played a bit with the microswitch (pushed it in a bunch of times with my finger) it would sometimes let me roll the windows up. In the last week this trick stopped working.

I purchased a new microswitch (the sensor where the top latches) and put it in thinking it would resolve my problem. NOPE.

Now I dont have any other ideas as to what the problem might be.

FYI the light on the dash that shows that the top is being put up or down does turn off when the top reaches its locking position.

Any help would be awesome.