Netstream consuming 100% of the CPU

Hi friends,

Netstream consuming 100% of the CPU of Mac OSX, and 55% of Linux

Code:

private function testInit():void
{
var nc:NetConnection = new NetConnection();
nc.connect(null);

var nsMict:NetStream = new NetStream(nc);
nsMict.attachAudio(Microphone.getMicrophone());
}

Someone sure how to solve it? I am using flash player 9.0.124

Thank's!