Newbie question...sendAndLoad with PHP

1

I’m trying to pass a username and password to a php script using sendAndLoad (Flash MX Professional 2004):

if (user != “” && pass != “”) {

	status = "Begin Login Process - Wait...";
	
	var c = new LoadVars();
	var d = new LoadVars();
	c.user = user;
	c.pass = pass;
	c.sendAndLoad("/Login/login_process.php",d);
	status = d.status;
	
}

the result is “undefined”. The username and password values do not seem to reach the php.

Any ideas on what I’m doing wrong?