Hyperlinks => 404 problem

Hi there,

I’m on wordpress 4.0 and I ve a problem with my hyperlinks :
When I create an hyperlink (ctrl+K), the link redirects to a 404 page of my website.

Example, I want to create an hyperlink for this website http://www.startupview.com/mybusymeal/ ==> http://www.startupview.com/mybusymeal/www.mybusymeal.com

How can I fix it?

Cheers,

Raphael