สคริปส่งเมล์ครับไม่รู้เปงรัยตอนแรกก็ส่งได้น่ะครับมาวันนี้เมล์ไม่เข้าครับส่งไป

<?


if($_POST['submit']){
	if(isset($_POST['i_verify']) && $_POST['i_verify']==@array_sum($_SESSION['num_to_check']) && $_POST['i_verify']>0 && trim($_POST['i_verify'])!=""){
			
		/*echo "<span style='color:green;'>Right</span>";*/
		$_SESSION['num_to_check'][0]=rand(1,9);
		$_SESSION['num_to_check'][1]=rand(1,9);

	$strTo = "[email protected]";
	$strSubject = $_POST["txtSubject"];
	$strHeader = "Content-type: text/html; charset=windows-874\r\n"; // or UTF-8 //
	$strHeader .= "From: ".$_POST["txtFormName"]."<".$_POST["txtFormEmail"].">\nReply-To: ".$_POST["txtFormEmail"].""; 
	$strMessage = nl2br($_POST["txtDescription"]);
	$flgSend = @mail($strTo,iconv( 'UTF-8' , 'TIS-620' , $strSubject ) , iconv( 'UTF-8' , 'TIS-620' , $strMessage) ,iconv( 'UTF-8' , 'TIS-620' , $strHeader));  // @ = No Show Error //
	if($flgSend)
	{
	
		echo "<a href='content-detail.php'><center>Thank you, your email has been sent.</a>";
		echo "<span style='color:green;'>Right</span></center>";
		
		?>
		<script>
    		if(confirm("Thank you, your email has been sent."))
   			 {
        		location = "contact.php";
   			 }
   				 else
    		{
        		history.back();
    		}
</script>

		
		<?		
		
	}else{
			/*echo "I'm sorry, there seems to have been an error trying to send your email. Please try again.";*/
			?>
			<script>
    		if(confirm("I'm sorry, there seems to have been an error trying to send your email. Please try again."))
   			 {
        		location = "contact.php";
   			 }
   				 else
    		{
        		history.back();
    		}
</script>
		
	<? }
		exit;	
}else{
		?>
		<script>
    		if(confirm("I'm sorry, Wrong Number. Please try again."))
   			 {
        		location = "contact.php";
   			 }
   				 else
    		{
        		history.back();
    		}
</script>
	<?
		echo "<center><span style='color:red;'>Wrong</span></center>";
		$_SESSION['num_to_check'][0]=rand(1,9);
		$_SESSION['num_to_check'][1]=rand(1,9);		
		exit;	
			}
}

 
?>

  <form name="FrmMain" class="FrmMain" method="post" action="mailer.php">
													  
	
	<table id="Table_01" width="622" height="268" border="0" cellpadding="0" cellspacing="0">
     <!--DWLayoutTable-->
     <tr>
          <td width="23" valign="bottom"><!--DWLayoutEmptyCell-->&nbsp;</td>
          <td width="569" valign="bottom"><!--DWLayoutEmptyCell-->&nbsp;</td>
          <td width="30" valign="bottom"><!--DWLayoutEmptyCell-->&nbsp;</td>
     </tr>
		 
              
               <br>
               <!-- <table width="510" border="0" cellspacing="0" cellpadding="0">-->
                    <!--DWLayoutTable-->
                    <tr> <td><span class="style1">Name:*</span></td>
                         <!--<td width="210" height="29" valign="top"><span class="login">&nbsp;ชื่อ : </span> &nbsp;&nbsp;</td>-->
                         <td width="569"><input name="txtFormName" id="txtFormName" type="text" class="styled" /></td>
						 <td></td>
                    </tr>
                    <tr> <td ><span class="style1">Email:*</span></td>
                         <!--<td height="34" valign="top"><span class="login">&nbsp;อีเมล :</span></td>-->
                         <td><input name="txtFormEmail" id="txtFormEmail" type="text" class="styled" /></td>
						 <td></td>
                    </tr>
                    <tr> <td><span class="style1">Subject:*</span></td>
                         <!--<td height="29" valign="top"><span class="login">&nbsp;เรื่อง  :</span></td>-->
                         <td valign="top"><input name="txtSubject" id="txtSubject" type="text" class="styled" /></td>
						 <td></td>
					</tr>
                    <tr>  
						<td valign="top"><span class="style1">Enquiry:*</span></td>
                         <!--<td height="255" valign="top"><span class="login">&nbsp;ข้อความ : 
                              &nbsp;&nbsp;</span></td>-->
                         <td valign="top" ><label>
                              <textarea name="txtDescription" id="txtDescription" cols="30" rows="10" class="styled"></textarea>
                              <br>
                              <br>
							  <!--spay -->
		 						<div id="verify_math">
 								<span class="digital" style="background-position:<?=($_SESSION['num_to_check'][0]*-30)?>px 0px;"></span>
								<span>+</span>
  								<span class="digital" style="background-position:<?=($_SESSION['num_to_check'][1]*-30)?>px 0px;"></span>
  								<span>=</span>
  								<span>
  								<input name="i_verify" type="text" id="i_verify" maxlength="2" />
								</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>**Please key results. </b>
							    
								<!--End spay -->
                              </div>
                             <!-- <input name="submit" type="submit"  value="Send Message">
                              <input name="reset" type="reset" value="Clear">-->
                         </label></td>
						 <td></td>
                    </tr>
               
          <!--</form>-->
     
     <tr>
          <td height="29" valign="top"><!--DWLayoutEmptyCell-->&nbsp;</td>
          <td valign="top" background="../images/article_08.png"><span class="style1">
<!--DWLayoutEmptyCell--><BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
			<input name="submit" id="submit" type="submit"  value="Send Message">
			<input name="reset" type="reset" value="Clear">
          </span>
          <td valign="top"><!--DWLayoutEmptyCell-->&nbsp;</td>
     </tr>
	 <tr>
          <td height="29" valign="top"><!--DWLayoutEmptyCell-->&nbsp;</td>
          <td valign="top" background="../images/article_08.png"><BR />
57  Moo.1 T.Maenam Koh Samui Suratthani 84330 &nbsp;  T.077332040&nbsp; Fax-077248300&nbsp;</td>
          <td valign="top"><!--DWLayoutEmptyCell-->&nbsp;</td>
     </tr>
</table>
</form>