Avatar Problem in bbPress & Affiliates

I have isntalled the edubb theme on bbpress forum and upload the avatar-bbpress.php file into that folder too..

I just edit the config option at the top of this file

//------------------------------------------------------------------------//
//---Config---------------------------------------------------------------//
//------------------------------------------------------------------------//

$wpmu_url = 'http://blog.al/';
$wpmu_users_table = 'wp_users';
$wpmu_usermeta_table = 'wp_usermeta';
$wpmu_blogs_table = 'wp_blogs';
$user_avatars_path = 'http://blog.al/wp-content/avatars/user/';

and save all..
But i get an error in the forum:

Fatal error: Call to undefined function avatar_display_bbpress() in /home/blogal/public_html/forum/bb-templates/eduBB/topic.php on line 62

? Have i made something wrong?

My second question is about the affiliates.

Work this plugin only with supporters? Can normal users take part to affiliate too? Is there a way to remove the affiliate widget from dashboard?

Thanks a lot