My menu links do not go to the correct link

[Mo2600]

Hi! i recently set the script on my domain http://sh4g.me Everything seems to work alright apart from the menu links. My 'home' and 'video' link do not go to the correct link. It stays on the page it currently is on. For example i click the contact page. The link goes to the contact page, but then if i want to go back to the home or videos page. It stays on the contact page. All other links work just fine.

Any help will be greatly appriciated.

Thanks in advance