Need help with p.window; Audi 90- Was:Door Panel Removal?

[Hugh Farfan <dpch@tbol.net>]

Thanks guys, I got it off in 5 minutes, needed to fix the power window,
seems it came of the guide.  After I put the window back on the plastic
guide I brought the window all the way up, then as i tried to move it
back down again the guide disconnects from the window so the window
stays up because of friction, but the guide returns back down.  I see a
little screw with a white cap on the black plastic guide that the bottom
of the window goes into, does this screw tighten up the guides grip on
the bottom of the window thus fixing my problem or is it more serious.
TIA
1988 Audi 90