You need to put teh swash mode to 3S if it is not already. I think the default on my 6EXH was 1S, the Axe is 3S.

Secondly, disconnect all the servos and start over.

Pitch and throttle are mixed still have their respective channels 3 and 6. On the front panel of the 6EXH is the list of channels.

It's a simple fix, you just have the channels mixed up. Swap the connectors for channels 2 and 6.