Multisite – Use Same Database Files

I have a main domain of christiangays.com and two subdomains of chat.christiangays.com and dating.christiangays.com.

Integration is good as far as Users are concerned but SM is creating database tables for each site, so that each member has 3 ID numbers.

On wp-config.php I have added
define( ‘CUSTOM_USER_TABLE’, ‘bbvsf_users’ );
define( ‘CUSTOM_USER_META_TABLE’, ‘bbvsf_usermeta’ );

On simple-wp-membership.php at top of page under <?php I have added

//access the $wpdb object
global $wpdb;
//set the table prefix to the cg.com prefix
$wpdb->set_prefix(‘bbvsf_’, false);

Add at very bottom of page

//set it back to the usual
$wpdb->set_prefix(‘chat_’, false); (or dating_)

File: class.swpm-members.php

Line 80 under

function prepare_items() {
global $wpdb;

add

$wpdb->set_prefix(‘bbvsf_’);

line 158 – after

$columns = $this->get_columns();
$hidden = array();
$sortable = $this->get_sortable_columns();

$this->_column_headers = array($columns, $hidden, $sortable);
$this->items = $wpdb->get_results($query, ARRAY_A);

add

$wpdb->set_prefix(‘chat_’); (or dating_)

It is not working.
Any ideas?