loadVars.sendAndLoad

Need some help getting back the answervariabel from the phpfile
turns up undefined, the code

 
lv = new LoadVars();
new_lv = new LoadVars();
new_lv.onLoad = function() {
if (this.sent== "OK") {
statusmsg.text = "something";
play();
} else {
statusmsg.text = "something else";
play();
}
};
function sendMessage() {
lv.text1 = t1.text;
lv.sendAndLoad("textfiles/movie1writer.php", new_lv, "POST");
statusmsg.text = "checking...";
}

 
<? 
$fd = fopen("movie1.txt", "w"); 
$write = fwrite($fd, "text1=$text1"); 
if ($write){ 
	echo urlencode("sent=failed"); 
	}else{ 
		echo urlencode("sent=failed"); 
		}