Realname Module Not Working

Greetings,

I have both Authorpane and Realname installed, but the Authorpane block still displays the username and not the realname. Here is the code as is written in the /plugins/content_types/author_pane.inc file:

    if (module_exists('realname')) {
      $block->title = theme('username', $account, array('plain' => TRUE));
    }
    else {
      $block->title = check_plain($account->name);

The realname module is properly configured and works sitewide.

I sincerely appreciate any advise you can offer,

Shane.