Reactor - roller chain

[Honzik]

Hi guys, i have already once opened a thread about reactor - chain, but this time i am not talking about a normal chain, i am talking about a roller chain (if you don't know what i mean i have a attached a picture of it, it's the one you have on a bicykle) . The thiing i would want to do is acctually a simple kind of motor. Maybe 2 cog wheels and just to see how it works with reactor. Unfortunaletley i dont know much about rector and therfor i would need some kind of tutorial because i surfed the whole web, but i ´didn't find a thing :-( . I have alreaddy made the chain, and one cog wheel, but always when i try to animate it fails. What i did : I animated the cog wheel to turn i little bit and then set the needed properties to the chain and the wheel . And clicked creat animation, but everytime the chain somehow jumped of(Even though i had set the chain to a concave mesh. i Tried a gizion times, but i can't get it to work. So please if anyone could tell me how to do it i would be very happy. Thanks