สอบถามปัญหาเรื่องการสมัครสมาชิกเข้าไปล้วเหมือนไม่เก็บข้อมูลครับ

<style type="text/css">
<!--
body {
 margin-left: 0px;
 margin-top: 0px;
}
.style1 {
 color: #0000FF;
 font-weight: bold;
}
.style2 {font-weight: bold}
.style3 {font-weight: bold}
.style5 {color: #0000FF}
.style6 {
 color: #333333;
 font-weight: bold;
}
-->
</style><table width="218"  border="0" cellspacing="0" cellpadding="0">
                        <tr>
                          <td align="center" valign="top"><? if(!($MEM_USER)) { ?>
             <form name="form1" method="post" action="login.php">
                              <table width="100%"  border="0" cellspacing="0" cellpadding="0">
                                <tr>
                                  <td><table width="100%"  border="0" cellspacing="0" cellpadding="0">
                                      <tr>
                                        <td><img src="images/line_top.gif" width="218" height="19" /></td>
                                      </tr>
                                  </table></td>
                                </tr>
                                <tr>
                                  <td><img src="images/member_login.gif" width="218" height="34"></td>
                                </tr>
                                <tr>
                                  <td><table width="90%"  border="0" align="center" cellpadding="0" cellspacing="0">
                                      <tr>
                                        <td valign="top" background="images/line1.gif"><img src="images/line1.gif" width="2" height="2"></td>
                                      </tr>
                                      <tr>
                                        <td><table width="100%"  border="0" cellspacing="0" cellpadding="0">
                                            <tr>
                                              <td colspan="2">&nbsp;</td>
                                            </tr>
                                            <tr>
                                              <td width="42%" height="25"><img src="images/username.gif" width="73" height="22"></td>
                                              <td width="58%" height="25"><input name="MEM_USER" type="text" class="box_txt" id="MEM_USER" size="15"></td>
                                            </tr>
                                            <tr>
                                              <td height="25"><img src="images/password.gif" width="73" height="22"></td>
                                              <td height="25"><input name="MEM_PASS" type="password" class="box_txt" id="MEM_PASS" size="15"></td>
                                            </tr>
                                            <tr>
                                              <td height="25" colspan="2"><div align="center">
                                                  <input name="Submit" type="submit" class="button" value="Log in">
                                              afdf</div></td>
                                            </tr>
                                            <tr>
                                              <td colspan="2">&nbsp;</td>
                                            </tr>
                                        </table></td>
                                      </tr>
                                      <tr>
                                        <td background="images/line1.gif"><img src="images/line1.gif" width="2" height="2"></td>
                                      </tr>
                                  </table></td>
                                </tr>
                                <tr>
                                  <td><table width="90%"  border="0" align="center" cellpadding="0" cellspacing="0">
                                      <tr>
  &#3639;&#3617;&#3619;&#3627;&#3633;&#3626;&#3612;&#3656;&#3634;&#3609;</a></td>
                                      </tr>
                                  </table></td>
                                </tr>
                              </table>
                          </form>
             <? }else { ?>
             <form name="form1" method="post" action="login.php">
                              <table width="100%"  border="0" cellspacing="0" cellpadding="0">
                                <tr>
                                  <td><table width="100%"  border="0" cellspacing="0" cellpadding="0">
                                      <tr>
                                        <td>&nbsp;</td>
                                      </tr>
                                  </table></td>
                                </tr>
                                <tr>
                                  <td><img src="images/member_login.gif" width="218" height="34"></td>
                                </tr>
                                <tr>
                                  <td><table width="90%"  border="0" align="center" cellpadding="0" cellspacing="0">
                                      <tr>
                                        <td valign="top" background="images/line1.gif"><img src="images/line1.gif" width="2" height="2"></td>
                                      </tr>
           <tr>
            <td><div class="style3"><strong>&#3618;&#3636;&#3609;&#3604;&#3637;&#3605;&#3657;&#3629;&#3609;&#3619;&#3633;&#3610;&#3588;&#3640;&#3603;&nbsp;<? if($MEM_USER!=""){ echo $MEM_USER; }?></strong></div></td>
                                      </tr>
           <tr>
            <td>&nbsp;</td>
                                      </tr>
                                      <tr>
                                        <td>
          
            <p>
          <script language="javascript" type="text/javascript">
           function logout(){
            if(confirm(" ")== true){
             window.location="logout.php";
            }
           }
          </script>
          
    </a></p></td>
                                      </tr>
                                      <tr>
                                        <td background="images/line1.gif"><img src="images/line1.gif" width="2" height="2"></td>
                                      </tr>
                                  </table></td>
                                </tr>
                              </table>
                              <p align="left"><? } ?>
                </p>
        </form>                </td>
                        </tr>
                        <tr>
                          
    <td background="images/bg_b.gif"><table width="100%"  border="0" cellspacing="0" cellpadding="0">
        <tr> 
          <td><img src="images/bg_b.gif" width="218" height="2"></td>
        </tr>
      </table></td>
                        </tr>
                    </table>