Hmm, that's the link to a send button. However I may have found the issue, there is an server 500 error on the directory. This usually indicates a misconfiguration of either an .htaccess file, or a problem on the server itself. I'm assuming you are on shared hosting, so the second shouldn't be a problem. Another potential issue is again permissions. However you already made sure the directory was 777. Can you make sure there is not .htaccess in the icons directory, and if your files were uploaded to it?
BTW this is what is linked: