Hud flight director not working properly?

[Crabby 28]

Not sure what I may be doing wrong, but I have noticed that the flight director in the HUD does not seem to function correctly for me.  My understanding is that you line up the flight vector with the flight director when using the hud and this is "flying the needles".  In the P3D version this worked just fine.  Notice I am on KSTL ils rwy 30R and the flight director wants me to move very high and left.  As soon as I do, the flight director either disappears or moves to another location in the hud.  Again, my understanding is that on speed, if you line up the flight vector with the flight director in the hud, this little baby will just fly down to the runway.

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[bendead 30]

I also have a lot of issue with the HUD, the flight path symbol, will jump all over it during a steady approach and when it's fixed on the runway threshold, you will land way before it.

 

For the moment it's only good at showing you PFD information on a big display, very far from what we had on the PMDG 737NGX