Getting blank textures after 3dsMax export

[LStone]

I've followed the video tutorial of the dog object being exported into BTB from 3dsMax. But everytime I export my object to BTB it tells me that the textures are missing and I have to make a texture list amd manually place the correct textures in place of the blank ones? Is there anyone else having this problem and if so is there something I'm doing wrong?

Thanks in advance for any help