Android : Switchcompat not displaying the Switch

I am trying to use the latest appcompat which was updated for material design in my app to show the switch view as displayed in Lollipop(http://android-developers.blogspot.in/2014/10/appcompat-v21-material-design-for-pre.html), the problem is the switch is not getting displayed. My SDKmin is 14 and max is 21. I am using the below code in the layout:

<android.support.v7.widget.SwitchCompat
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:showText="false" />

Build.gradle:

dependencies {
    compile 'com.android.support:cardview-v7:+'
    compile 'com.android.support:recyclerview-v7:+'
    compile 'com.android.support:palette-v7:+'
    compile 'com.android.support:support-v4:+'
    compile "com.android.support:appcompat-v7:21.0.+"
    compile fileTree(dir: 'libs', include: ['*.jar'])
}