Rotate animation not working in android 4.0
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In my android application, i apply programmatically a rotation animation to a drawable object :

		Animation rotation = AnimationUtils.loadAnimation(this, R.animator.rotate);
		rotation.setRepeatCount(Animation.INFINITE);
		progressDialog.findViewById(R.id.progress).startAnimation(rotation);

This is working fine in Android 2.3, but fails in 4.0. The drawable is not animated in 4.0.
What could go be the problem here ?

**EDIT**
Here is my `rotate.xml` file :

    <set xmlns:android="http://schemas.android.com/apk/res/android"
        android:shareInterpolator="false">
        <rotate
            android:fromDegrees="0"
            android:toDegrees="360"
            android:pivotX="50%"
            android:pivotY="50%" 
            android:duration="2000"
            android:repeatCount="-1"
            android:interpolator="@android:anim/linear_interpolator"/>
    </set>