Wiki comments with Comments Evolved for WordPress

I've just added the Comments Evolved for WordPress plugin to my site and I'd like to get it working with the WPMU Wiki plugin.

Comments are off by default on all of my wikis.

HERE'S WHAT I DID:
Enabled comments on a single, low-traffic wiki.
Cleared the W3 Total Cache.
Browsed to the wiki.

HERE'S WHAT I EXPECTED:
The Comments Evolved for WordPress element to appear below the wiki content.

HERE'S WHAT HAPPENED:
No Comments Evolved for WordPress element appears below the wiki content.

HERE'S WHAT ELSE I TRIED:
Deactivate, delete, reinstall, and reactivate WPMU Wiki plugin - same results.
Adding a comment to the wiki from WP-Admin - the comment appears neither below the wiki content nor in the "Discussion" tab.