Alien Bees Wireless Trigger Problem

I bought 4 AB800s and was able to set up 4 lights to work wirelessly with one of the cheap ebay radio triggers (It plugs into one of the AB800s as the master and the rest of the AB800s work ask slave). I have no problem to shoot at home or in my studio. However, I am having problem at the wedding where everyone fired their flash and my AB800s also fired... how do I stop this? What do I need? Is Pocket Wizard is the answer? What model (Plus 2)? Appreciate for all helps and suggestions.

I am sure someone experienced this before...and the answer is here but I look around and could not find it.

Thanks

NDN