Hi, Well there is many things that can be wrong, can you please be more specific about the steps you took to get your skin ingame?
How do u save your DDS, where do you put it, what is its name? How did you try to browse it ingame
Beside that, i strongly recommend you not to use 0,0,0 black, use very dark grey. Game needs some shades of the color left for shadows and HDR effects. Same goes for white, use light grey. Same goes for any collor, never use fully saturated colors. It will not look good.
Cheers