Error: "The document information panel was unable to load"

I was building a demo where I was wanting to show the document information panel in Word 2007 (which I think is one of the neatest features about it!) . It should look like:

Document Information Panel Correct

But instead I was getting “The document information panel was unable to load“.

Document Information Panel Error

I couldn’t see a reason for this, but investigation found this post which shows the same error, and a solution in the comments:

The System Event Nofication Service (SENS) uses the same communication “channels” (not the correct word, but works) as does office products do in communicating with the server.
Stop and disable the SENS service on the server and everything will work perfectly.

So, open a command prompt and type:
net stop sens

Bit strange, but that fixed it for me. Also note the comment at the bottom that the Document Conversions service doesn’t work on a single server demo system like this.

Error: "The document information panel was unable to load"