FTP Problems

I'm trying to create some functionality which requires FTPing onto another server, using the php functions. Doing the following comes up with a successful login, but cannot display the current directory; yet when I FTP directory from the server which is serving the php pages, it works fine. // set up basic connection $conn_id = ftp_connect($ftp_server, 21); ftp_pasv($conn_id, true); // login with username and password $login_result = ftp_login($conn_id, $username, $password); // check connection if ((!$conn_id) || (!$login_result)) { echo "FTP connection has failed!"; echo "Attempted to connect to $ftp_server for user $username<br />"; exit; } else { echo "Connected to $ftp_server, for user $username<br />"; } echo(ftp_pwd($conn_id)."<br />"); # Comes back with / $buff = ftp_nlist($conn_id,""); // close the FTP stream ftp_close($conn_id); var_dump($buff); => comes back with bool(false) exit; Can anyone see what could be wrong? Cheers Nunners