Email Attachment Problem

[neroag]

Hi Guys
Im using the following to send a text file as an attachment, the file is about 10kb all works fine, email is sent & received inc the attachment but the attached file is blank it removes all the text.

Can anyone help please ?

<?php 
function mail_attachment($filename, $path, $mailto, $from_mail, $from_name, $replyto, $subject, $message) { 
    $file = $path.$filename; 
    $file_size = filesize($file); 
    $handle = fopen($file, "r"); 
    $content = fread($handle, $file_size); 
    fclose($handle); 
    $content = chunk_split(base64_encode($content)); 
    $uid = md5(uniqid(time())); 
    $name = basename($file); 
    $header = "From: ".$from_name." <".$from_mail.">\r\n"; 
    $header .= "Reply-To: ".$replyto."\r\n"; 
    $header .= "MIME-Version: 1.0\r\n"; 
       $header .= "Content-type:text/plain; charset=iso-8859-1\r\n";
    $header .= "Content-Transfer-Encoding: base64\r\n"; 
    $header .= "Content-Disposition: attachment; filename=\"".$filename."\"\r\n\r\n"; 

if (mail($mailto, $subject, "", $header)) { 
echo "ok";
    } else { 
echo "error";
    } 
} 
// how to use 
$my_file = "06-January-2006.txt"; 
$my_path = "C:/files/"; 
$my_name = "Myname"; 
$my_mail = "[e-mail]"; 
$my_replyto = ""; 
$my_subject = "Backup"; 
$my_message = "no Message"; 
mail_attachment($my_file, $my_path, "[e-mail]", $my_mail, $my_name, $my_replyto, $my_subject, $my_message); 
?>

Thanx guys