Help with 3-D Emmiter/Glasses

Hi,

I have my emitter activated and my glasses charged.
The 3-D demo when I first booted up the laptop was perfect ...all in 3-D, but now when I game, it remains in 2-D.

I went to the settings, put 120h screen, apply, reboot, and it still won't work.
Did I miss something?

Emitter is active.
Glasses are on/charged.
Settings are at 120h screen.