you're close. you want to make two loadVars - outgoingVars and incomingVars (those are names i made up). then, you put anything you want to send out in outgoingVars:

outgoingVars.buttonPressed = "pestcontrol";

here's an example of send and load - sending vars to serverside scripting (php, asp, cf) just like an html form would do with a form submit.

Code:
//
function doSend(){
	outgoingVars.sendAndLoad("flashForm.aspx",incomingVars,"GET");
	gotoAndPlay("submitted");
	}// function
//
//
incomingVars.onLoad = function(success) {
	gotoAndPlay("received");
}
//
here outgoingVars are sent to an asp page that handles form submissions called "flashform.aspx". that flashform.aspx will receive everything i put in outgoingVars. you could put your whole form in flash with what you know.

the onLoad function will happen when your outgoingVars are delivered (instantly usually).

gotta go. hope that gets you going.