[mqxxou]

Hi :)
Im' not sure it's your torrent client.

Try to search in announce.php :

foreach (array("passkey","info_hash","peer_id","port","downloaded","uploaded","left") as $x)
	if (!isset($$x)) // problem here, a $ is on more ...
		err("Missing key: $x");

replace by

foreach (array("passkey","info_hash","peer_id","port","downloaded","uploaded","left") as $x)
	if (!isset($x))  // now it's ok
		err("Missing key: $x");

Good luck.