how do you start a satio .40
Mitch,
Is this a new engine? If so, be sure you break it in good.
One thing to watch out for, if you prime the engine (by holding fingers over muffler) always turn the prop a few times WITHOUT THE GLOW PLUG on, and make sure the engine is not hydro-locked.
You say you have tried to start the engine, what does the engine do? The most info you can give us the better.
Like John B suggested, if your new to the hobby, drop by and get some help. They can probably have it cranked and running good in no time.