Can't Add Pictures To Build Application. :(

Hello, I was filling out an application for the WC build team, and everything looked really good so then i went and clicked the "Insert Image" button and put the direct link of my first build picture in and then, instead of my picture, a little blue box with a ? in the middle showed up. Then I exported my picture as all the other types of files available, and none of these worked. By the way, this is on a mac, so if that's a problem......... :|
I also tried just dragging the pictures into the text box instead of using the "Insert Image" button, and that didn't work either, on any of the types of files i exported them as. So if anyone could help with this, that'd be great!

 

use this site: http://imgur.com/ and send the link in there