[Plugin: Microkid’s Related Posts] Using variable from other function

Hi there,

I’m pretty new with WordPress and I have a question about plugin: Microkid’s Related Posts.
I’ve added an extra field in db table ‘wp_post_relationships’ so I can separate different related posts. The variable $related_post_title is uses in other functions of this plugin. Therefore I want to use $related_post_title to help me do this.
However, $related_post_title seems to be empty in the function where i’m trying to use it. I works when I fill $related_post_title manually.

Here is my code.. How can I use $related_post_title in this function?

function MRP_save_relationships( $post_id, $related_posts, $related_post_title ) {

		global $wpdb;

			// First delete the relationships that were there before

		MRP_delete_relationships( $post_id ); 

			// Now add/update the relations
		if( $related_posts ) {
			foreach( $related_posts as $related_post) {					

				if($related_post_title == "something"){
					$relation_type = 2;
				}
				else{
					$relation_type = 1;
				} 	

				$related_post = (int) $related_post;
				$query = "INSERT INTO ".$wpdb->prefix."post_relationships VALUES( $post_id, $related_post, $relation_type)";
				$result = $wpdb->query( $query );

			}
		}
	}