I have a white D'lite, if you put you machine on it's side so you can see the bottom of the machine. you will see a slot with a lever in it. push it in and to the right and your teeth will go down. to put them back up push the lever in and toward you, turn the wheel on your machine and they will pop back up. see if this does it. If your machine has an extension table in it take it off first or you won't see it.