Genre=trance/dance(?), era= late 90'/early 00', artist=unknown

The song is a trance/dance (or something like that) song from the 90's/early 2000's , its used in a cs-movie from early 00's..

There is a sling with some kind of flute (pan flute maybe) in the song. We called it 'the pan-flute song'...

It goes like 'du du dudu-duuu(last tone straight) du du dudu-duu(last up) duduu(down) du du dudu-duu(straight), du du duduu-duu duu(down)... " and so on.. any ideas