link problem

Since last few days am facing a problem and am not being able to rectify that.

Actually when i click on any of the link of my home page then instead of that particular page, browser is redirected to the home page only. It may be either be ‘contact us’ page or ‘about us’ page, its just the home page which displays again n again. But once i login to my wp-admin and then even when i log out, the site starts working properly.

I even tried to reset the default theme but even then the problem persists. Can any one please help me in this regard.

Here is my site: http://clashvideos.com