Cannot play streamtuner
 

I installed streamtuner (the new version's 0.99.99.12 search engine does work now) but when I click Start is does not stream.
You see shortly a popup 'streaming' and the popup disappears.

When I surf to www.shoutcast.com and click on a channel 'Tune In' it starts normally the default media player and streams it.

What can be the problem ?