why are my maps transparent?

[bh]

I'm trying to texture map a 3ds model. Its mesh is blue and black. When I apply the texture map (mainly white) it just shows transparent. Anyone?

[Rassilon]

What 3d modeling prog you using? What is the texture dimentions/format?

[bh]

Hi Rass... it's a downloaded model. I've set the texture map as a jpg and sized it according to the model radius. ie Radius 40 therefore texture size 256X256.