Specular not appearing with assigned material


as i load a mesh from blender (simple icosphere with uvmap and default blender shaded material + texture uv map)
i got a nice specular appearing

but, if i use a user defined material , the specular is gone
althought parameters are setup

Material My Material : Common/MatDefs/Light/Lighting.j3md {
     MaterialParameters {
        Shininess : 10.5
        Specular : 1.0 1.0 1.0 1.0
        DiffuseMap : Flip Textures/mire.png

test = assetManager.loadModel(“Models/Test.j3o”);

//-------- below i added these 4 lines of code to assign my material to the object
//-------- if i remove these lines, it uses original blender material that works
Node n=(Node) ((Node)test).getChild(0);
Geometry geo=(Geometry) n.getChild(0);

and i use the same diffuse texture that i used to uv map my mesh in blender

what do i miss ?

found it

if you have the same problem …

i had to set useMaterialColors to tru and diffuse to some value