Flash Database Operation Failed - php

Question

I have a problem with my Flash (.fla) project. I've connected my flash with database with php script. I used ActionScript 2.0.
The problem is data can show at compile program on AdobeFlash CS6 (CTRL+Enter) but data cant show in datagrid when I open the .swf.
It's my php script
<?php
mysql_pconnect ("localhost", "root", "");
mysql_select_db ("modul");
$qr = mysql_query("SELECT * from nilaisiswa");
if (!qr || mysql_num_rows($qr)==0) {
$r_string = '&errorcode=3&msg='.mysql_error().'&';
} else {
$r_string = '&errorcode=0&n='.mysql_num_rows ($qr);
$i = 0;
while ($row = mysql_fetch_assoc ($qr)) {
while (list ($key, $val) = each ($row)) {
$r_string .= '&' . $key . $i . '=' . stripslashes($val);
}
$i++;
}
$r_string .='&';
}
echo $r_string;
?>
And here it's my ActionScript 2.0
var select_lv:LoadVars = new LoadVars();
var insert_lv:LoadVars = new LoadVars();
var delete_lv:LoadVars = new LoadVars();
var today:Date = new Date();
var deleteIndex:Number;
var errorMsgs:Array = [
"",
"Couldn't connect to server",
"Couldn't connect to database",
"Error running query",
"First four entries may not be deleted"];
var filepath:String;
var scoreInfo:Array = [];
var headerListener:Object = {};
headerListener.headerRelease = function(event:Object) {
switch (event.columnIndex) {
case 0:
if (scores_dg.getColumnAt(0).sortedUp) {
scores_dg.sortItemsBy(scores_dg.columnNames[0], Array.CASEINSENSITIVE | Array.DESCENDING);
} else {
scores_dg.sortItemsBy(scores_dg.columnNames[0], Array.CASEINSENSITIVE);
}
scores_dg.getColumnAt(0).sortedUp = !scores_dg.getColumnAt(0).sortedUp;
break;
case 1:
if (scores_dg.getColumnAt(1).sortedUp) {
scores_dg.sortItemsBy(scores_dg.columnNames[1], Array.NUMERIC | Array.DESCENDING);
} else {
scores_dg.sortItemsBy(scores_dg.columnNames[1], Array.NUMERIC);
}
scores_dg.getColumnAt(1).sortedUp = !scores_dg.getColumnAt(1).sortedUp;
break;
}
}
function zerofill(n:Number):String {
if (n<10) return '0' + n.toString();
else return n.toString();
}
filepath = "http://localhost/tesis/";
nickname_ti.maxChars = 50;
date_ti.maxChars = 10;
score_ti.text = 0;
date_ti.text = today.getDate() + '-' + zerofill(today.getMonth()+1) + '-' + zerofill(today.getFullYear());
select_lv.onLoad = function(ok:Boolean) {
if (ok) {
if (this.errorcode=="0") {
for (var i:Number=0; i < this.n; i++) {
scoreInfo.push(
{record:this["id"+i],
nickname:this["nickname"+i],
score:Number(this["score"+i]),
dateposted:this["dateposted"+i]
});
}
scores_dg.columnNames = ["nickname", "score", "dateposted"];
scores_dg.getColumnAt(0).width = 130;
scores_dg.getColumnAt(0).sortOnHeaderRelease = false;
scores_dg.getColumnAt(0).sortedUp = false;
scores_dg.getColumnAt(0).headerText = "Nickname";
scores_dg.getColumnAt(1).width = 130;
scores_dg.getColumnAt(1).sortOnHeaderRelease = false;
scores_dg.getColumnAt(1).sortedUp = false;
scores_dg.getColumnAt(1).headerText = "Score";
scores_dg.getColumnAt(2).width = 130;
scores_dg.getColumnAt(2).headerText = "Date Posted";
scores_dg.dataProvider = scoreInfo;
scores_dg.addEventListener("headerRelease", headerListener);
msg_ta.text = "Enter data and click Add to add a score.";
} else {
msg_ta.text = errorMsgs[Number(this.errorcode)];
if (this.errorcode == "3") msg_ta.text += ": " + this.msg;
}
} else {
msg_ta.text = "Flash-database select operation failed";
}
}
msg_ta.text = "Getting high scores from database...";
select_lv.sendAndLoad(filepath + "getscores.php", select_lv, "GET");