Shadow texture problem with wheels

Hi,

I've found some good looking wheels on a solo Citaro mod (the RTM Citaro). I 've liked to put them under a Citaro G. The front and the middle axles' are OK, because I just have to copy the files and change the wheel declaration in the files, the values were the same.

But with the trailer's it wasn't as easy: I had to reposition them to their correct place in Blender.

I've converted the .o3d of the wheels with 3DObject converter to .obj, I reposited the .obj files in Blender, theese were exported as .obj and converted back to .o3d with the 3DObject converter.

I haven't done anything with the textures neither programs, but at the first step, when I converted from .o3d to .obj I tried with textures and without textures, but the result was the same:

at daytime the rear wheels were a bit lighter:

in the dark (always "shines" like this"):

Here is the wheels part of the model.cfg:

************************
Main Wheel Right
************************


[mesh]
M-M\Roues\RRR5.o3d




[viewpoint]
1


[illumination_interior]
-1
-1
-1
-1


[newanim]
origin_trans
1.099
-0.39
0.485
anim_rot
Wheel_Rotation_2_R
57.295779513082320876798154814105


[newanim]
origin_rot_y
-90
anim_trans
Axle_Suspension_2_R
1


************************
Main Wheel Left
************************


[mesh]
M-M\Roues\RRL5.o3d




[viewpoint]
1


[illumination_interior]
-1
-1
-1
-1


[newanim]
origin_trans
-1.099
-0.39
0.485
anim_rot
Wheel_Rotation_2_L
57.295779513082320876798154814105


[newanim]
origin_rot_y
-90
anim_trans
Axle_Suspension_2_L
1

I'm not an Omsi-expert, but it seems for me, the shadows missing.

So I would like to ask for your help, how could I fix this bug.

Thanks in advance,
T-621