If anyone can still help with a SuperProgram problem...

[Cholland]

I've got a SuperProgram that I admit has been in my bag for a long while 
since I've had my DS around. Anyways, I decided to use it last night. 
Turned it on, shot some pictures. Now here's my problem: I can't switch 
it back to the locked position. It seems like the grey button you press 
as you slide it back to L (or into 125x or Bulb) won't press down. (I 
can switch between Auto-shutter and Manual modes, but you never had to 
press the grey button to change between those).

Anybody have any clue if there's a remedy for this? This is my 
first/favourite camera and it would be a real shame to me if it was 
stuck like this.

Thanks everybody.