The keyword density for the term “gambling” might be a little high (8.42%), but I wouldn’t think that would prevent your other pages from being indexed. If you have re-submitted your site to Yahoo recently, that might have done it. It’s better if you don’t submit your sites at all, and let them find your changes naturally.
Otherwise, I’m not seeing an obvious problem on the front-end or in the source code. Everything is pretty clean and the way search engines like it.