Okay next step:
Go to each analog input and hit the "advanced" tab. Make sure that, as you move the input to its extremes, the slider moves with it.
Also check the scaling. If the scaling is totally porked (for example) it could damp all your input until it seems nothing's working. Just an example.
Make sure that's all good.
THEN, if throttle still buggy, click the "reverse" option (whatever it's called) and try again. Throttle seemed backwards to me at first when I was running the beta, so I clicked that, and it did the opposite of what I wanted.