Digium Free Fax for Asterisk License Error

Hi, folks.

It strikes me that a topic like this has probably been beaten to death, but all my searching has led me no solution.

I have FreePBX running on a server:
2.6.18-194.11.1.el5 #1 SMP Tue Aug 10 19:05:06 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux

I have purchased, downloaded, installed, and registered the Free Fax for Asterisk license from Digium:

I have confirmed that the license is where it should be:

I have confirmed that the license is installed:

I have confirmed that the modules are loading:

And yet, when I create an extension with a fax destination, I still get:

Now I’ve read the documentation that came with the license:

But that seems to be more command-line based, and has nothing to do with the FreePBX interface.

I’ve searched these forums for people who have had similar troubles, but this particular problem - where the license is installed, but still unusable - doesn’t seem to be among them.

Does anyone have any thoughts?