azavarin

mrcherry, open ms-functions.php and add
global $wpdb, $wp_queries;
at the first line of function body
and

if($wp_queries){
            $pattern = $wpdb->base_prefix;
            $prefix = $wpdb->base_prefix . $blog_id . '_';
            $wp_queries = str_replace($pattern, $prefix, $wp_queries);
 	}

between lines
switch_to_blog($blog_id);
and
install_blog($blog_id, $title);