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FSX Aircraft animation problem

Hi guys,

I'm sure this might be a very basic problem, but anyways...

I'm newbie with aircraft animation, although quite experienced with scenery ones. I'm trying to get a very basic rudder animation to work in FSX or P3Dv3 (same problem on both).

The model:
A dummy with the model name (model_name);
Another dummy for the LOD (model_name_LOD_400) Underneath it;
Underneath it there are two simple box and a tube:
Box01 represents the fuselage;
Box02 represents the rudder (stores rudder_percent_key animation);
Tube01 to store an ambient animation;

The animation:
The rudder is animated from full left to full right with 5 keys (0, 25, 50, 75, 100) using linear controllers. I added to it "rudder_percent_key" animation following the same old Animation Manager tool procedures;
The tube is animated up and down using same procedure as before, but with ambient animation.

All things seems to be right to export (proper GUID, proper name, proper LOD conventions). Verify tool shows no problem at all "your model is perfect"!

Exported to x and xanim files without any problem. Also no error or warning was generated from the XtoMDL tool. Needless to say that I user /XANIM option.

Then I took the MDL and tested it over the Carenado stock model. (backed up the original model and renamed my model to BonanzaII.MDL).

Fired up FSX and tested the model. It shows right, but no rudder response (it is full deflected to the left - frame 0). The ambient animation is working fine though.

Modeldef.xml is ok and in the right folder to compile.

I have also tried to use the old DC3 from FSX sdk with the same problem: no animations inside FSX (or P3D).

I'm using 3DS Max 2015, FSX SP2 and P3D v3.
To compile, I'm using P3D v1 SDK. I don't think this is a problem, 'cause I have made a lot of animations with it, working on both FSX and P3D.

What am I doing wrong here?