I've had some problems with those files because if you download them from the thread, they aren't .bmp files by default. The game cannot use .png files as textures and if I just changed the extension to .bmp, iit still didn't work for me. But that's why it's not working for you.
Three Peaks Manor
Premier showing & breeding facility since 2007
Some of my textures are .png, so sorry! I like to work on them in high quality before converting, it's a bad habit I know. You can fix it easy by opening it in your paint.net or other programs and fix it by saving it as a .bmp!