Help Please.. QtMultimediaKit 1.1 not installed

Hi everyone!

I am facing a problem in playing any audio file in my qml application when I use QML Audio Element or QML Soundeffect Element.
It says:
[COLOR="red"]module "QtMultimediaKit" is not installed
import QtMultimediaKit 1.1
^ [/COLOR]

The code is as under:
import QtQuick 1.0
import QtMultimediaKit 1.1

Text {
text: "Click Me!";
font.pointSize: 24;
width: 150; height: 50;

Audio {
id: playMusic
source: "music.wav"
}
MouseArea {
id: playArea
anchors.fill: parent
onPressed: { playMusic.play() }
}
}

The same thing happens when I try to run the following code:

import Qt 4.7
import QtMultimediaKit 1.1

Text {
text: "Click Me!";
font.pointSize: 24;
width: 150; height: 50;

SoundEffect {
id: playSound
source: "music.wav"
}
MouseArea {
id: playArea
anchors.fill: parent
onPressed: { playSound.play() }
}
}
Please guide me how to install this module.
I am using Qt SDK 1.12