How to get actionscript input to be pass to php?

Hi I want to know how do I get an user input from actionscript to pass to PHP

My php code is like that:


What is wrong with it ? it does not seen to work, the postal is the name of the input textbox in actionscript.
My actionscript:
var postalOut:LoadVars = new LoadVars();
postalOut.sendAndLoad(passingurl, postalIn, “GET”);