Refresh chrome werkt niet goed

<?PHP
// Session openen
session_start();
//Connect database
require('../config/config.php');

session_start();
if($_SESSION['security'] == "78dueyCG5HSGD29dbcYDBYuyb96b8GDBdi67d8g6dxDbSiD2bxSH2"){

?>
<meta http-equiv="refresh" content="30;URL=http://www.bonanzateam.nl/bonanzaradio123/reactiegroot.php"/>


<div align="center">
<?php
if($_SERVER['REQUEST_METHOD'] == 'POST')
	{
	if(count($_POST['aCheck']) > 0)
		{
		foreach($_POST['aCheck'] AS $sValue)
			{
			mysql_query("UPDATE `bericht` SET `status` = 0 WHERE `id` = {$sValue}") or die (mysql_error());
			}
		}
	}  
?>
<form action="http://www.bonanzateam.nl/bonanzaradio123/reactiegroot.php" method="post">
<p align="center">&nbsp;</p><p><a href="http://www.bonanzateam.nl/bonanzaradio123/main_index.php"></a></p>
<div align="center">
  <table style="border: 1px solid black" bgcolor="#EEEEEE" width="100%" border="0" cellspacing="0" cellpadding="0">
    <tr class="Arial18pxBlackBold">
      <td width="2%"><input type="checkbox" name="checkbox" value="checkbox"></td>
      <td width="20%" height="19" align="center">Afzender</td>
      <td width="43%" align="center">Bericht</td>
      <td width="35%" align="center">Verzoek</td>
    </tr>
  </table>
</div>
<p align="center"> 
  <?php
if($sql = mysql_query("SELECT * FROM `bericht` WHERE `status` = 1 ORDER BY `id` ASC"))
	{
	if(mysql_num_rows($sql) > 0)
		{
		$aantal = mysql_num_rows($sql);
		echo "<font class='Arial18pxblack'>Er is/zijn <b>".$aantal."</b> verzoekje(s)<br>\n</font>";
	
		while($record = mysql_fetch_array($sql)) 
			{
			echo "<table width='100%' style='border: 1px solid black' bgcolor='#EEEEEE'>";
			echo "<tr height='60' class='Arial18pxblack'>";
			echo "<td><input type=\"checkbox\" name=\"aCheck[]\" value=\"{$record['id']}\" />";
			echo "<td align='center' width='20%' align='left'>{$record['naam']}";
			echo "<td align='center' width='50%' align='left'>{$record['bericht']}";
			echo "<td align='center' width='30%' align='left'>{$record['verzoek']}";
			echo "</tr>";
			echo "<table>";
			echo "<br>";

			}
		
		echo "<br />";
		echo "<input name=\"submit\" type=\"submit\" value=\"Verwijder\"><br>";
		}
	else
		{ die("<font class='Arial20pxBlack'>Er zijn geen berichten gevonden!</font>"); }
	}
?>
</p>

<?
}
?>