problem in receiving mailwith attachment

in my website there is a form for sending mail attachment.. i am receiving the attachment in my mail . but the problem is that in my mail am receiving one more attachment of size 210 B and name AT00001 along with the original one , i dont know from where it is coming . the code is given below, is there any problem with the code?

$fileatt = $cms_root_path.'resume/'.$_FILES['userfile']['name'] ; // Path to the file
$fileatt_type = "application/octet-stream"; // File Type
$fileatt_name = $_FILES['userfile']['name']; // Filename that will be used for the file as the attachment
$email_from = $_POST['name']." ".$_POST['email']; // Who the email is from
$email_subject = 'Application';
$email_message ='
			<table cellpadding="3" cellspacing="1" border="0" width="600">
                                                                                       
                                                                                      <tr>
					<td width="120">Name</td>
					<td>'.$_POST[name].'</td>
				</tr>
				<tr>
					<td width="120">Age</td>
					<td>'.$_POST[age].'</td>
				</tr>
				<tr>
					<td width="120">Date of Birth</td>
					<td>'.$_POST[date].'/'.$_POST[month].'/'.$_POST[year].'</td>
				</tr>
				<tr>
					<td width="120">Gender</td>
					<td>'.$_POST[gender].'</td>
				</tr>
                                                                                         <tr>
					<td width="120">Nationality</td>
					<td>'.$_POST[nation].'</td>
				</tr>
				<tr>
					<td width="120">Country of Residence</td>
					<td>'.$_POST[country].'</td>
				</tr>
                                                                                       <tr>
					<td width="120">Contact Telephone</td>
					<td>'.$_POST[phone].'</td>
				</tr>
                                                                                        <tr>
					<td width="120">Email</td>
					<td>'.$_POST[email].'</td>
				</tr>
				<tr>
					<td width="120">Applying For</td>
					<td>'.$_POST[applyfor].'</td>
				</tr>
               			</table>
				';
$email_to  = 'aaa@dk.com';

//adds the e-mail address of the sender
$headers = "From: ".$_POST[email];
$semi_rand = md5(time());
$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";

$headers .= "\nMIME-Version: 1.0\n" .
"Content-Type: multipart/mixed;\n" .
" boundary=\"{$mime_boundary}\"";

$email_message .= "This is a multi-part message in MIME format.\n\n" .
"--{$mime_boundary}\n" .
"Content-Type:text/html; charset=\"utf-8\"\n" .
"Content-Transfer-Encoding: 7bit\n\n" .
$email_message . "\n\n";

$file = fopen($fileatt,'rb');
$data = fread($file,filesize($fileatt));
fclose($file);


$data = chunk_split(base64_encode($data));

$email_message .= "--{$mime_boundary}\n" .
"Content-Type: {$fileatt_type};\n" .
" name=\"{$fileatt_name}\"\n" .
//"Content-Disposition: attachment;\n" .
//" filename=\"{$fileatt_name}\"\n" .
"Content-Transfer-Encoding: base64\n\n" .
$data . "\n\n" .
"--{$mime_boundary}\n";
unset($data);
unset($file);
unset($fileatt);
unset($fileatt_type);
unset($fileatt_name);

@mail($email_to, $email_subject, $email_message,  $headers);

PHP:

please give me a solution ....any help will be appreciated.