Trapcode Particular Question: Falling Coins

Hello
I am creating a falling coin animation using Trapcode Particular. I created the looping animation of the fall coin, selected it as my custom particle but when I run a preview, even though I have the emitter behind the camera and have the life span of the particles longer than my comp, I get random coins that keep appearing and disappearing. When I preview the same clip with spheres as my particle, I get a constant stream of particles.

The animation looks more like flashing coins rather then a falling group of coins. Is there some setting I might not have checked.

Any info would be greatly appreciated.


Jaison