Also, try it with TrueView off.
Make sure you have Trap enabled in your TIR software for F12 so the game and TIR don't compete for the keystroke.
Not sure where either option is located at. I do not see a TrueView in the ROF settings nor do I see a Trap option in the TIR software.
A tip on the inversion process for Axis - click the invert check box BEFORE you move the axis. Then move the aaxis and it should be inverted.
How is this possible? The invert button is grayed out when you click "Change". Even if it wasn't, the software would register my mouse movement when I try to click Invert!
EDIT: Nevermind, found both TrueView and TRAP. Trap was already enabled... disabled TrueView and no dice.