Quick help for a noobie

This is probably a very basic question but I am having trouble with it. When I load my variables from php and then try to trace it, it gives me undefined, but when I go to list variables it says my variable arraystring is there in level0. How do I call variable arraystring? Here is my code.


lv = new LoadVars();
lv.load("http://www.jmumm.net/heather/directory.php");
trace(this.arraystring);