I used box.... but I can try imageshack then. I think myself that the head is pretty cool. just wait

Because Box, is a file hosting site, not an image hosting site.

Box, is a file hosting place, which lets you download the image from that site, and i'm pretty sure it doesn't support direct links, which are what you need.

Sites like imageshack, are image hosting sites, and instead of making you download it, you can just view the image. And it DOES support direct links.