Created objects don't reflect lights

[ElyStardust]

Hi everyone,
I've a problem with the dff that I mod on Blender. When I export dff and col modified, it doesn't reflect the light of veichles.
Has this ever happened to you?
I don't know if I forget to set some properties of materials, but if I modify a dff and then I export it, without export the col file, and I use orginal col file, it reflectes the light correctly.
Can you help me?