Hi,
if the Adrenaline dives when you have your controls in neutal position and also trimmed neutrally, you may try the following:

- re-callibrate the input device
- trim elevator stick up a bit

In general the Adrenaline flies level only on full throttle. With less it may dive a litte bit. This is to make it more pleasant to fly it inverted.

Cheers,
Lego