We have an older (30yr) wooden, 4-panel garage door with a screw-drive door opener. It has worked for 4-5 years without a problem until recently. In spite of lubricating the track, wheels and hinges, one wheel will pop out of the track jamming the door open. We remove the wheel (or wheels) that have popped out of the track and have tried to put them back in and tighten up screws, etc. to no avail. After one or 2 openings, the wheel will pop out again. Thanks for your help.