BuddyPress.org

please help! my buddypress plugin is not working. i am using the latest version of buddpress plugin on my site. the group, signup, sitewide activity are not working. if you click the group button, it will just open a page with a title label ‘Group’, without the function of creating group. Even the sitewide activity, it is the same. it just open a page with a label. that is just the same in all buddpress pages on my site. i don’t know what to do. i have deactivated all plugin except buddpress but problem is still there. i am using detube theme and my website is http://www.ememisong.tv , can anyone help? i am a newbie to WordPress and buddypress.