At first it did not work. There was same error that was described in the beginning of this topic.
The problem was that some hosting providers BLOCK some ports. The minute port was unblocked, all started to work just great!
I have a question, however:
Is it possible to apply some filters for listeners:
number of allowed requests per hour and no more than X requests per day (ip based)
Is there a way to make a way for listeners to search for a song before they request it?