PHP แบบทดสอบอัพขึ้นเซิร์ฟเวอร์แล้วคะแนนเป็น 0

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คือผมสร้างแบบทดสอบด้วยภาษา php แต่พออัพขึ้นเซิร์ฟเวอร์จริงคะแนนออกเป็น 0 อะครับ
ไฟล์ที่ 1
<form name="form1" method="post" action="test_ans.php">
<?
$host="localhost";
$username="technology_db";
$password="1DumqkmpS5";
$db="technology_db";
$tb="testing";
mysql_connect( $host,$username,$password) or die (" NO Mysql");
mysql_select_db($db) or die("NO");
$sql="SELECT * FROM testing order by rand() limit 10";
$db_query=mysql_query($sql);
$i=0;
while($result=mysql_fetch_array($db_query))
{
$i++;
?>
<table  border="0" align="center" >
                                  <tr>
                                    <td width="129"><div >
                                      <h3>
                                        <input name="id_ques[<?=$i;?>]" type="hidden" value="<?=$result["id_ques"];?>">
                                        <?=$result["question"];?>
                                      </h3>
                                    </div></td>
                                  </tr>
                                  <tr>
                                    <td><input name="c<?=$i;?>" type="radio" value="1" />
                                      <?=$result["c1"];?></td>
                                  </tr>
                                  <tr>
                                    <td><input type="radio" name="c<?=$i;?>" value="2" />
                                      <?=$result["c2"];?></td>
                                  </tr>
                                  <tr>
                                    <td><input type="radio" name="c<?=$i;?>" value="3" />
                                      <?=$result["c3"];?></td>
                                  </tr>
                                  <tr>
                                    <td><input type="radio" name="c<?=$i;?>" value="4" />
                                      <?=$result["c4"];?>
                                      <input name="ans[<?=$i;?>]" type="hidden" value="<?=$result["ans"];?>" /></td>
                                  </tr>
                                  <tr>
                                    <td><center>
                                      <img src="images/bar2.png" width="597" height="1">
                                      </center>
                                      &nbsp;</td>
                                  </tr>
                                </table><?
}
mysql_close();
?>
<div align="center"><br>
<input type="hidden" name="line" value="<?=$i;?>">
<input type="submit" name="Submit" value="ตรวจคะแนน">
</div>
</form>

ไฟล์ test_ans.php

<?
$score=0;
for($i=1;$i<=$_POST["line"];$i++)
{
    if($_POST["c$i"] == $_POST["ans$i"])
    {
            $score=$score+1;
    }
}
echo "True $score<br>";
?>

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