In case I have not been clear about this by default the running page for posts on your blog is the front page. You can set a static page as a front page if you wish, but you cannot link your main page for posts to an external site. http://en.support.wordpress.com/pages/front-page/
I’ve no interest in linking my main page to an external site.
My front page is static.
But clicking on the header text doesn’t take me to any page, it just says “OOPS! THAT PAGE CAN’T BE FOUND.”
What page can’t be found?