You are not doing anything wrong.
Before trying to drag images onto the box we need to get the "Red X" to go away. If you see a coffee cup it means that the application is trying to load and the "Red X" means that the application failed to load.
There is most likely issue with your Web browser (Firefox, Internet Explorer, etc.). The drag-n-drop multiple image upload feature uses a technology called "Java Applet". We need to make sure that your computer and web browser are updated to support the Java Applet.
The first thing to do is download and install a current Web browser. This will likely solve the problem and make your experience on all websites more enjoyable. We recommend Firefox but Windows Internet Explorer will also work just fine.
You can download these Web browsers at the following links:
Firefox
http://www.mozilla.com/firefox/
Microsoft Internet Explorer (MSIE)
http://www.microsoft.com/windows/ie/default.mspx
If you already have a current web browser we will need to install the "Java Runtime Environment" (JRE) which allows your Web Browsers to run Java Applets.
To download the Java Runtime Environment for your computer go to the following address and follow any instructions provided.
http://java.com/en/download/index.jsp
If you are still encountering problems after following these instructions for updating your Web browser, change the Internet Options for your Web browser so that Java Applets are "allowed to run".