Ok, I've updated the Alpha channel, but still problems. See the following screenshots? Maybe someone see something not in place?
This is a shot when selecting the aircraft. The texture show bright and normal

This is a shot when the aircraft is selected. See the difference from the first shot? the aircraft also appear this dark in gameplay.

This is the texture settings in DXTBMP.

and here is the texture settings in Gmax

[edit]I've even detached and removed ALL the textures, and still the same. Also I,ve attached some standard textures from Gmax just to experiment, and still no luck :-([/edit]