Problem using Phonon

Hi, I have a problem using Phonon, I don't know if I have to install something(else from QT) , I ran the example in http://api.kde.org/4.0-api/kdelibs-a...onon_tut1.html(copied and pasted), modified the .pro file to include QT += phonon, and it gave me this error: Attachment 5121. Could anybody show me the right way to do a simple media player, or show me what I am doing wrong? It should be easy, but I don't know what Im doing wrong.

Thanks beforehand, for taking the time to try helping me

You should install the phonon libraries. I can't give you more clues. I am using Linux :p