look at the log folder there are some logs or missing files found there ^^
LOL? I bet he is really missing some files. Oh wait nah, errors are clean(Maybe not if he didn't fix he's problems), but my secret locator(Intuition.) says that buttons texture is just "ButtNormal.tga" . Dang, I didn't know the log part you wrote....(Oh well, never too late to study. <Please don't post no sense like other 3 members already did there. I disrespect those useless posts and posters.>)
OnTo: You have to create a new render function or use a existing one for buttons(If you want to create your own, there is a lot of examples in the source if you are even a beginner(2DRender.cpp should help you in the beginning.). (Source work, about 2-3 files to edit(Not too hard, worth to try.))