[android help] ProgressBar backround not showing on emulator but not on phone

Im using ProgressBars in a ListView. The Background is white and the ProgressBar default.

        android:id="@+id/timerProgress"
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:layout_marginRight="3dp"
        android:layout_marginLeft="3dp" />

When I open the app in my 4.2.2 emulator everything looks normal (blue bar with gray background)

But on my 4.2.2 (Gnex) phone its just the blue bar and no background at all (the white background from the parent view).

Any idea what the problem could be?

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