DVD rom ltd-166s drawer won't stay closed

I know this was posted about a CD drive but there were no solutions given to the problem. I plugged in the DVD drive and turned on my computer and the drawer opened up on power on, I closed it and a couple seconds later it ejected again. It stays open while I reboot, while my computer is running and I can’t use the drive. Any ideas?? Thanks

amd athalon xp 2400
512 pc3200
WD 80g HD

I’ve got the same problem with an 811s. Just started last week. So I ordered an NEC 3500. Now if the price of dl media would come down to an affordable level :confused: