ต้องการเขียนระบบส่งอีเมล์แบบ แนบไฟล์รูปด้วย PHP ผมแนบไฟล์รูปไปด้วยไม่ได้ครับ

<form action="php_pro/contact_us_send.php" method="post"  name="form2" id="form2" onSubmit="return validateForm()" enctype="multipart/form-data">
                  <table width="400" border="0" align="center" cellpadding="5" cellspacing="0">
                    <tr>
                      <td height="7" colspan="2"></td>
                    </tr>
                    <tr>
                      <td colspan="2" align="left" class="style8"><span class="style17"><span class="style1">สนใจบริการ</span>&nbsp;/&nbsp;<span class="style1">แนะนำติชมบริการ</span>&nbsp;/&nbsp;<span class="style1">สั่งซื้อสินค้า</span></span></td>
                    </tr>
                    <tr>
                      <td width="76" align="right" class="style8"><div align="left" class="style24"><span class="style47">ชื่อผู้ติดต่อ :</span></div></td>
                      <td align="left"><div align="left">
                          <input name="userFirstName" type="text" id="userFirstName" size="40" maxlength="50">
                      </div></td>
                    </tr>
                    <tr>
                      <td align="right" class="style8"><div align="left" class="style24"><span class="style47">E-mail :</span></div></td>
                      <td align="left"><div align="left">
                          <input name="userEmail" type="text" id="userEmail" size="40">
                      </div></td>
                    </tr>
                    <tr>
                      <td align="right" class="style8"><div align="left" class="style24"><span class="style47">โทรศัพท์ :</span></div></td>
                      <td align="left"><div align="left">
                          <input name="userPhone" type="text" id="userPhone" size="40">
                      </div></td>
                    </tr>
                    <tr>
                      <td align="right" valign="top" class="style8"><div align="left" class="style24"><span class="style47">ข้อความ :</span></div></td>
                      <td align="left"><div align="left">
                          <textarea name="userComment" cols="30" rows="7" id="textarea3"></textarea>
                      </div></td>
                    </tr>
                    <tr>
                      <td valign="top"><div align="left" class="style24"><span class="style47">Image :</span></div></td>
                      <td align="left"><label>
                        <input type="file" name="imageSend" id="imageSend">
                      </label></td>
                    </tr>
                    <tr>
                      <td valign="top">&nbsp;</td>
                      <td align="left"><div align="left">
                          <input name="imageField2" type="submit" value="ส่งข้อความ">
                          <input type="reset" name="Reset" value="ลบข้อความ">
                      </div></td>
                    </tr>
                  </table>
              </form>

<?
	$strTo = "[email protected]";
	$strSubject = $_POST[userFirstName];
	$strMessage = nl2br($_POST[userComment]);

	//*** Uniqid Session ***//
	$strSid = md5(uniqid(time()));

	$strHeader = "";
	$strHeader .= "From: ".$_POST[userFirstName]."<".$_POST[userEmail].">\nReply-To: ".$_POST[userEmail]."";

	$strHeader .= "MIME-Version: 1.0\n";
	$strHeader .= "Content-Type: multipart/mixed; boundary=\"".$strSid."\"\n\n";
	$strHeader .= "This is a multi-part message in MIME format.\n";

	$strHeader .= "--".$strSid."\n";
	$strHeader .= "Content-type: text/html; charset=UTF-8\n"; // or UTF-8 //
	$strHeader .= "Content-Transfer-Encoding: 7bit\n\n";
	$strHeader .= $strMessage."\n\n";
	
	//*** Attachment ***//
	if($_FILES["imagesSend"]["name"] != ""){
		$strFilesName = $_FILES["imagesSend"]["name"];
		$strContent = chunk_split(base64_encode(file_get_contents($_FILES["imagesSend"]["tmp_name"]))); 
		$strHeader .= "--".$strSid."\n";
		$strHeader .= "Content-Type: application/octet-stream; name=\"".$strFilesName."\"\n"; 
		$strHeader .= "Content-Transfer-Encoding: base64\n";
		$strHeader .= "Content-Disposition: attachment; filename=\"".$strFilesName."\"\n\n";
		$strHeader .= $strContent."\n\n";
	}
	

	$flgSend = @mail($strTo,$strSubject,null,$strHeader);  // @ = No Show Error //
	if($flgSend){
		echo "<script>alert('Email send successfully.')</script>";
		echo "<meta http-equiv='refresh' content='0; url=../home.php'>";
	}else{
		echo "<script>alert('Email Can Not Send')</script>";
		echo "<meta http-equiv='refresh' content='0; url=../home.php'>";
	}
?>