FSX and strange trackIR pitch

[amis]

I use TrackIR 4 PRO and FSX SP1. My problem is that when I look up on the overhead panel, my viewpoint moves to strange position. The picture shows what I can see if I try to look up at overhead in FSX. (my viewpoint goes down under dash-board)
http://forums.avsim.net/user_files/191626.jpg
The 2nd picture shows the same situation in FS9. It works properly here.
http://forums.avsim.net/user_files/191627.jpg
Any idea what is wrong with FSX?
Both pictures are taken within 3 minutes in the same conditions, TrackIR centered. Simply in FS9 (and other games like LockOn or race sims) it works fine. But FSX... see pic.
Thank you for help.
Win XP, SP3

[amis]

Problem probably solved. I had my Vector on headphones before. I have put it on black TrackIR cap and it works properly even in FSX.