Code PHP between ผมผิดตรงไหนครับ ช่วยที่ครับมือใหม่ งมมา 3 วันแล้ว

<?
// àª×èèÍÁµèÍ°Ò¹¢éÍÁÙÅ
$host="localhost"; // ¡Ó˹´ host
$username="root"; // ¡Ó˹´ username
$pass_word="1234"; // ¡Ó˹´ Password
$db="admin_tan888"; // ¡Ó˹´ª×èÍ°Ò¹¢éÍÁÙÅ
$Conn = mysql_connect( $host,$username,$pass_word) or die ("µÔ´µèÍ°Ò¹¢éÍÁÙÅäÁèä´é");// µÔ´µèÍ°Ò¹¢éÍÁÙÅ
mysql_query("SET NAMES utf8",$Conn); // set ¡Ó˹´ÁÒµÃÒ°Ò¹
mysql_select_db($db) or die("àÅ×Í¡°Ò¹¢éÍÁÙÅäÁèä´é"); // àÅ×Í¡°Ò¹¢éÍÁÙÅ 
//---> 
?>
<form id="form1" name="form1" method="post" action="viewg1.php">
¤é¹ËÒ <input name="txt_search" type="text" value="<?=$_POST['txt_search']?>" />
to 
<input name="txt_search2" type="text" value="<?=$_POST['txt_search2']?>" />
<input name="Search" type="submit" value="¤é¹ËÒ" />
</form>
<table width="600" border="1" cellspacing="2" cellpadding="2">
<tr>
<td><div align="center">ÃËÑÊ</div></td>
<td><div align="center">ª×èÍ</div></td>
<td><div align="center">date</div></td>
<td><div align="center">á¡éä¢</div></td>
</tr>
<?
$sql_show = "select * from guide2";
if($_POST['Search'])
{
$txt_search = $_POST['txt_search'];
$txt_search2 = $_POST['txt_search2'];
//"SELECT * FROM `guide2` WHERE `date` between '$field' AND '$field2' " ;
//$sql_show.=" where date like '%$txt_search1%' or date like '%$txt_search2%' ";
echo $sql_show.=" where date between '%$txt_search%' AND '%$txt_search2%' ";
}
$result_show = mysql_query($sql_show) or die(mysql_error());
while($row_show = mysql_fetch_array($result_show))
{
?>
<tr>
<td><?=$row_show['id']?></td>
<td><?=$row_show['groupp']?></td>
<td><?=$row_show['date']?></td>
<td><div align="center"><a href="edit.php?edit_id=<?=$row_show[id]?>">á¡éä¢</a></div></td>
</tr>
<?
}
?>
</table>