Bp corporate theme -activation

I downloaded the theme and uploaded in onto my site. when I activate it i get an error message.

I'm uploading the theme using FileZilla

Please see error message below

Fatal error: Cannot redeclare bp_dtheme_register_actions() (previously declared in /home/bplannet/public_html/wp-content/themes/bp-corporate/_inc/ajax.php:30) in /home/bplannet/public_html/wp-content/plugins/buddypress/bp-themes/bp-default/_inc/ajax.php on line 77

Thanks