Getting nothing but fatal errors when trying to activate BuddyPress themes

Every Buddypress theme that I am trying to install and activate is giving me errors. Here is one for the BuddyPress Fun Theme:
Fatal error: Cannot redeclare bp_dtheme_ajax_querystring() (previously declared in /home/blogsmo/public_html/wp-content/plugins/buddypress/bp-themes/bp-default/_inc/ajax.php:20) in /home/blogsmo/public_html/wp-content/themes/funtheme/bp-fun/_inc/ajax.php on line 20