unwanted normals are shown on this object

Hey,
(sry for my engl.)
I think, that is not a problem of the Engine, but I am not shure and I can’t change it when I’m importing it.
As you can see on the pic, there is a very ugly transition of materials from one actor to the next. I don’t wat that.
I just want a not visable transition over the objects. There is no normal map, I created, exported or imported, so what I’m doing wrong?
Thanks for answears:)

Ok, I just had to combine the Meshes in Maya