I’m not exactly sure I know what you mean by “the wrong axis is activated”, but here goes.
If you want tp turn a character’s head, you would go into the Parameters tab and use the “yrot” parameter of the character’s head to turn it. You may also have to use the “yrot” parameter of the character’s neck as well. It depends on how much of a turn you want the head to make.
I have also found that, depending on the pose, I have to adjust the “tilt” of the head by adjusting the Bend rotation parameter for it to look correct, because just changing the “yrot” parameter puts the head at a strange angle.
Hope that helps.