Change Htm To Jpg Why Wont YouTube Change My Background?!?

Why wont YouTube change my background?!? - change htm to jpg

Whenever I try to change my background, do not let me. I have my little link in the table, because I have the picture from Google Images. Then, when I scroll to the channel version is gray and will not let me change this. The only option is to restore the values and do not change is either.HELP! http://images.google.com/imgres?imgurl=h ...
I WANT A LINK: