rFactor RFT 2012 Helmet problems

[Dux]

Hi

I try to create a helmet in RFT 2012 rFactor mod. I do it - convert it with DDS to an file that i can work on it then back in DDS and when i put in the game, and start the game afterwards there is a problem. The helmet is whole WHITE, no textures nothing.

Can someone help me with this problem ? Are there some settings i need to do while converting it etc ?

[EDIT 20.06.2013]: SOLVED