I guess the genre is trance.
The song starts with someone singing (weird words, which I couldn't understand), then trance, then a whistle. And starts over.
I recorded the whistle and uploaded in rapishare as a .wav file
http://rapidshare.com/files/122720693/assobio.wav.html
I'm desperately looking after this song, because nobody can tell me the name.
(and i'm sorry for the telephone ringing in the background, ahahah)
Thanks !