Try to remove wp better email setting on client admin site

I try to remove wp better email in setting menu

code
add_action( 'admin_menu', 'remove_submenu_email_wpbe_options',1999 );

function remove_submenu_wpbe_options()
{
global $current_user;
get_currentuserinfo();

// If user not Supper Admin remove export page
if ( !is_super_admin() )
{
remove_submenu_page( 'options-general.php', 'wpbe_options' );
}
}

it's not remove on client setting

i user wp multisite+bp