I've had this problem with a couple of themes I've tried to install from here, so I figure I must be doing something wrong.
The first one didn't say it was BP compatible, so I thought that might be it, but the same is happening here.
I get this:
Fatal error: Cannot redeclare bp_dtheme_ajax_querystring() (previously declared in /home/content/65/3511365/html/truereviewpledge/wp-content/themes/bp-business/_inc/ajax.php:17) in /home/content/65/3511365/html/truereviewpledge/wp-content/plugins/buddypress/bp-themes/bp-default/_inc/ajax.php on line 157
Any thoughts would be appreciated.