Reply to DJM 800 Post Fader Effects

I own the DJM 800 and while I was mixing last week I noticed that the post fader effects seem to have stopped.

Never had this problem happen before.

Quick step by step of how I use them, just to clarify if I'm doing it right....

*channel selected is 1
*beat effect selected is delay
*parameter set to 1/2
*bpm set to auto
*level/depth set to half

Now usually, I'd wait for the point I want to post fade and slam the channel fader down and bingo! But it just wasn't happening, any ideas?