Having trouble keeping the driver side staying in the rails

you have 2 guides on the window, ones on the top left corner of the glass and thee other is on the bottom right corne r of the glass. to get to the bottom one you remove the door panel and let the window all the way down you might have to take it out of the track to tilt it.!!!!!!there you have it PS ITS MISSING THE BOTTOM GUIDE WHEN THE WINDOWS 90% UP THE WEIGHT MAKES IT FALL FORWARD .