Hi,
you have to post the browser page where you do watch the stream.If you check this key link alone without right request header (origin / referer / cookies etc) paramters...
Code:
http://voyo.ro/lbin/mplay/eshop/ws/getAesKey.php?id=156749
....then it dosent work and you get status 403 forbidden.Just follow that key link in browser console if you see the stream and check the response = key you need and this you have to download like before was already explain.
greetz