ciao a tutti qualcuno sa dirmi perche questo script non funziona? invio la variabile "file" da form html con metodo post.

<?php
$file = $_FILES['file'];
$ftpServer = "greengo.orgfree.com";
$ftpUser = "greengo.orgfree.com";
$ftpPass = "marlboro";
$post_dir= "upload/files/";
if($file)
echo "got data";
$conn = @ftp_connect($ftpServer) or die("Cannot initiate connection to host");
$login = @ftp_login($conn, $ftpUser, $ftpPass or die("Cannot loin" );

$upload = @ftp_put($conn, $post_dir, $file, FTP_BINARY);
else
echo "haven't got data!!!";
if($upload)
echo "<table width='500' border='0'><tr><td><div align='center'><h2>File uploaded OK.</h2></div></td></tr><tr><td><div align='center'><h3>GO BACK<h3></div></td></tr></table>";
else
echo "<table width='500' border='0'><tr><td><div align='center'><h2>File upload failed.</h2></div></td></tr><tr><td><div align='center'><h3>GO BACK<h3></div></td></tr></table>";

ftp_quit($conn);

?>