I recently updated premium wordpress plugins.

I recently updated premium wordpress plugins. And the wp-admin pages have stopped showing up. The error logs from the hosted company shows an error in buddypress,

Cannot redeclare bp_core_maybe_install_signups() (previously declared in /home1/thephog0/public_html/wp-content/plugins/buddypress.old/bp-core/bp-core-update.php:430) in /home1/thephog0/public_html/wp-content/plugins/buddypress.old/bp-core/admin/bp-core-functions.php on line 827

Can some one help me on this? The admin pages are inaccessible for a long time.

Thanks