I assume the link to the site you posted above is for the live site and not the test site. I am unable to determine the cause of the problem, as you do not have MediaBox 2.11 installed on the live site.
Just because you're not paranoid doesn't mean everybody isn't out to get you.
meanwhile I have installed 2.11 but at first it did'nt still work. But after creating the link new, the icon appears at live site. In test environment I think I will create the link again and hope it works there too.