Virker på et domæne men ikke på et andet

PHP kode 

 <?php
 
 
 
     include_once( 'class/class.upload.php' );
     
     if(isset($_POST['upload'])){
     
         $filname=$_FILES['file_name'];
         
         $handle = new upload($filname);
         
         $handle->allowed = array('image/*');
         
         if($handle -> uploaded){
         
             $handle->image_border          = 5;   // defining border width
             $handle->image_border_color    = '#000'; // defining border color
             $handle->image_watermark = 'images/badge.png';  // watermark image src
             $handle->image_watermark_position = 'BR'; // watermark image position again "B" for bottom and so on.
             $handle->image_resize         = true;   // making resize function to true
             $handle->image_x              = 160;    // making width to 160px
             $handle->image_y              = 160;    // making hight to 160px
             $handle->image_watermark_x = -5; //change to fit your needs
             $handle->image_watermark_y = -5; //change to fit your needs
 
             $handle->process('uploads/');
            // if ($handle->processed) {
                 
                 //$message = '<div class="center"><p>Border color #F58462 added successfully</p><img src="uploads/'.$handle->file_dst_name.'" alt="" /></div>';
                 
                 
 
                 
                 
                  //*** Uniqid Session ***//
     $strSid = md5(uniqid(time()));
     $to = $_POST['mail'];
     $from = 'info@gmail.dk'; 
     $subject = 'Your new facebook picture';
     $headers = 'From: '.$from. "\r\n" . 'Reply-To: '.$from. "\r\n";
     $headers .= "MIME-Version: 1.0\n";
     $headers .= "Content-Type: multipart/mixed; boundary=\"".$strSid."\"\n\n";
     $headers .= "This is a multi-part message in MIME format.\n";
     $headers .= "--".$strSid."\n";
     $headers .= "Content-type: text/html; charset=utf-8\n";
     $headers .= "Content-Transfer-Encoding: 7bit\n\n";
     if($_FILES["file_name"]["name"] != "") {
     $strFilesName = $_FILES["file_name"]["name"];
     $strContent = chunk_split(base64_encode(file_get_contents('uploads/'.$strFilesName)));
     $headers .= "--".$strSid."\n";
     $headers .= "Content-Type: application/octet-stream; name=\"".$strFilesName."\"\n";
     $headers .= "Content-Transfer-Encoding: base64\n";
     $headers .= "Content-Disposition: attachment; filename=\"".$strFilesName."\"\n\n";
     $headers .= $strContent."\n\n";
     }
     $flgSend = @mail($to, $subject, $message, $headers); // @ = No Show Error //
     
    if($flgSend){
 
 echo "<font color='black'>Mail send completed</font>";
 $tmpfile = 'uploads/'.$strFilesName;
 // http://php.net/manual/en/function.file-exists.php
 if(file_exists($tmpfile)) {
 // http://php.net/manual/en/function.unlink.php
 unlink($tmpfile);
 
 
 }
 
 
 }
 
 
             }
             
             else {
         
         echo " <div id='error_txt'>file too large, can not be more than 2 megabytes</div><br /><br />"; 
         echo "<div id='ok_button'> <a href='ajax/profile.php'>OK</a></div>";
         
         }
             
         }
     //}
 
 ?>