BuddyPress.org

This is the error message “Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 30720 bytes) in /home/oppsnoel/public_html/wp-content/plugins/buddypress/bp-groups/bp-groups-classes.php on line 483”
I am using the wordpress 3.3 up to date upon activating buddy press it crashed the system and took the whole site down, would not allow any access to any area. Not that is a big drama i just deleted the file via filezilla the problem is I really want to use this plugin! So help would be great.
Thanks Noel