createjs.Sound.play("Blub", createjs.Sound.INTERRUPT_EARLY, 0, 0, loop);
"Blub" is the class name of the sound.
that file is not found at that location.
ie, Kalimba.mp3 is not on your desktop.
If you are using AS2 and the sound file is in the movie's Library, then you should have given that imported sound file an instance name. You then want to use that instance name with attachSound(instanceName) to connect the sound file with the Sound object. Here's a good tutorial that may help to expain in detail: kirupa.com - Playing Sounds in ActionScript