Sorry if this gets asked a lot, but I've read through so many TrackIR/Prepar3d posts that didn't apply to me.
I have P3Dv3. I have Ezdok and TrackIR installed and they work flawlessly in my PMDG 737-800 NGX. When I change into the PMDG 737-900 NGX, the TrackIR fails to move anything. Ezdok is still operational in this case.
I have no idea where the problem lies. Head tracking is enabled as far as I can tell from the Ezdok interface options. I thought I read somewhere that I need to edit the aircraft's cameras maybe? I don't remember needing to do that for the 737-800.
Any help would be appreciated!