สอบถาม login form ตาม Code ที่แนบมาเขียนใน Host จำลองไม่มีปัญหาอะไร แต่อัพขึ้นโฮสจริง login แล้วไม่สามารถโหลดไปหน้าแก้ไขข้อมูลได้ ผมต้องทำอย่างไรครับ

 <?
if ($maxboarduser==""){
?>
<table border="0" cellpadding="0" cellspacing="0" align="center">
          <tr>
            <td valign="top"></td><td valign="top">
              <form method="post"   action="index.php">
                <div align="left">Username: <br>
                  <input type="text" name="maxboarduser" maxlength="65" size="20">
                  <br>
                  Password:<br>
                  <input type="password" name="maxboardpwd" maxlength="65" size="20">
                  <br>
                  <input type="submit" name="Submit" value="เข้าสู่ระบบ">
                  <br>
                </div>
              </form>
</td>
              </tr>
            </table>
              <div align="center">
                
<?php
if(isset($_POST['Submit'])) {

$maxboarduser = $_POST['maxboarduser'];
$maxboardpwd = $_POST['maxboardpwd'];

include("config.in.php");
$db_conn = mysql_connect($host,$username,$password) or die ("ไม่สามารถติดต่อดาต้าเบสได้");
mysql_select_db($dbname,$db_conn);
mysql_query('SET NAMES tis620');
$query = "select * from member where login = '$maxboarduser' AND pass = '$maxboardpwd' ";
$result = mysql_query($query,$db_conn);
$rows = mysql_num_rows($result);
$arr = mysql_fetch_row( $result );
if($rows <= 0){
echo "<br><center>ID หรือ Pass สมาชิกไม่ถูกต้อง<br>กรุณาลองอีกครั้ง</center>";
}
else {
session_register("maxboarduser");
session_register("maxboardname");
session_register("maxboardpwd");
echo('Logged in.... Click <a href=><strong>here</strong></a>');
echo "<meta http-equiv=refresh content=0;URL=index.php>";
}
}
?>
<? }else{?>

                <table border="0" cellpadding="0" cellspacing="0">
                      <tr>
                        <td>&nbsp;&nbsp;&nbsp;</td><td><div class="lmenu"><strong>ยินดีต้อนรับ : <?=  $maxboarduser;?>
                        </strong></div>
                          <div><img src="images/line_h2.gif" width="186" height="1" border="0" alt=""></div>

<table border="0" align="top" cellpadding="0" cellspacing="0" width="180" bgcolor = '#DDDDDD'>
<tr><td height = '20' width='' bgcolor="#FFFFFF" class=cellbox align=left style=cursor:hand onMouseOver=this.style.background='#FF8428' onMouseOut=this.style.background='#FFFFFF' onClick=window.location.href=''>&nbsp;<a href='index.php' class='style1'><font color="#333333" class="ws8"><img src="tem/ul.gif" Border="0" width="9" height="9"> หน้าแรก</font></a></td></tr>
<tr><td height = '20' width='' bgcolor="#FFFFFF" class=cellbox align=left style=cursor:hand onMouseOver=this.style.background='#FF8428' onMouseOut=this.style.background='#FFFFFF' onClick=window.location.href='all.php'>&nbsp;<a href='all.php' class='style1'><font color="#333333" class="ws8"><img src="tem/ul.gif" Border="0" width="9" height="9"> ประกาศทั้งหมด</font></a></td></tr>
<tr><td height = '20' width='' bgcolor="#FFFFFF" class=cellbox align=left style=cursor:hand onMouseOver=this.style.background='#FF8428' onMouseOut=this.style.background='#FFFFFF' onClick=window.location.href='addform.php'>&nbsp;<a href='addform.php' class='style1'><font color="#333333" class="ws8"><img src="tem/ul.gif" Border="0" width="9" height="9"> เพิ่มประกาศ</font></a></td></tr>
<tr><td height = '20' width='' bgcolor="#FFFFFF" class=cellbox align=left style=cursor:hand onMouseOver=this.style.background='#FF8428' onMouseOut=this.style.background='#FFFFFF' onClick=window.location.href='all.php'>&nbsp;<a href='all.php' class='style1'><font color="#333333" class="ws8"><img src="tem/ul.gif" Border="0" width="9" height="9"> แก้ไขประกาศ</font></a></td></tr>

<tr><td height = '20' width='' bgcolor="#FFFFFF" class=cellbox align=left style=cursor:hand onMouseOver=this.style.background='#FF8428' onMouseOut=this.style.background='#FFFFFF' onClick=window.location.href='editmember.php'>&nbsp;<a href='editmember.php' class='style1'><font color="#333333" class="ws8"><img src="tem/ul.gif" Border="0" width="9" height="9"> แก้ไขข้อมูลส่วนตัว</font></a></td></tr>
<tr><td height = '20' width='' bgcolor="#FFFFFF" class=cellbox align=left style=cursor:hand onMouseOver=this.style.background='#FF8428' onMouseOut=this.style.background='#FFFFFF' onClick=window.location.href='changepwd.php'>&nbsp;<a href='changepwd.php' class='style1'><font color="#333333" class="ws8"><img src="tem/ul.gif" Border="0" width="9" height="9"> เปลี่ยนรหัสผ่าน</font></a></td></tr>
<tr><td height = '20' width='' bgcolor="#FFFFFF" class=cellbox align=left style=cursor:hand onMouseOver=this.style.background='#FF8428' onMouseOut=this.style.background='#FFFFFF' onClick=window.location.href='logout.php'>&nbsp;<a href='logout.php' class='style1'><font color="#333333" class="ws8"><img src="tem/ul.gif" Border="0" width="9" height="9"> ออกจากระบบ</font></a></td></tr>
</table>
</td>

                      </tr>
                    </table>
                <? }?>