Pages not saving?

Hi guys,

My site http://www.essentiallinux.org is having problems saving posts/pages.

What happens is – say for example I want to edit the “About” page. I click either “edit” or manage the page through the CP and when I click “publish” or even “save” it takes me back to the root of my website and the work I just did has not saved. It’s really annoying me.

Brand new install of wordpress and not using any plugins.

Help please.

John