Why in god's name are you starting out that page with an h6?! Aside from that problem, the rest of your HTML organization is horrible! You really need to study the correct uses of basic HTML structure. Stop with those DIVs instead of headers, headers instead of paragraphs, and completely random definition tags.

To be honest, your code is too skewed for me to be able to tell what's wrong with it. I will say that closing two DIVs after the text and then starting the navigation is probably part of the issue.