My pages don’t show correctly in IE/Safari/Chrome :(

Hi!

I have some compatibility problems with my website: https://www.patchyrecordings.com

The homepage is working in all the browsers, but when you click on a page (for example: ‘Contact’), the particular page will only show up if u use Firefox. In other browsers (like IE, Safari and Chrome) the page don’t show and in stead the sidebar is loaded where the page should have loaded… (Sorry I’m not an native english speaker, please test it if you don’t really understand the problem)

I hope someone can help me out with a solution! Thanks in advance ??