Your issue is that you are specifying the Widget.Holo.ActionBar.TabView
parent style for your main PropertyApp
style.
You will need to put that in your PropertyApp.ActionBar.Tab
style.
Then put the main parent theme for PropertyApp
like Theme.Holo.
<style name="PropertyApp" parent="android:style/Theme.Holo">
<item name="android:actionBarTabStyle">@style/PropertyApp.ActionBar.Tab</item>
</style>
<style name="PropertyApp.ActionBar.Tab" parent="android:style/Widget.Holo.ActionBar.TabView">
<item name="android:background">@drawable/tab_bar_background</item>
</style>
The naming of the parent styles will also depend on which API levels you are targeting. AppCompat for example if you are using that.
You can refer to the documentation on changing the tab backgrounds.