Hey Adam, thanks for reaching out, I'll gladly help!
And yes, @raincoaster is right, the minimum amount of characters has to be at 200 for our widget to start giving you recommendations, but I'm somehow afraid this isn't the case with you, right?
For now, I'd suggest you to install our browser extension, which you can find on our downloads page: http://zem.si/PqCSDD
After you install & enable your extension, go to your create-new-post page, open up the 'Screen Options' drop-down menu on the top right corner of your screen and un-tick the box next to "Use Zemanta to find related content".
Finally, refresh the whole page and your widget should load up.
Can you confirm this or does the problem still persist? Let me know, I'm eager to help you out! Here's my email address: support[at]zemanta[dot]com
Looking forward to your reply! Take care & have a nice day!