Logo not showing in Theme.AppCompat.Light.DarkActionBar style

Question

I cant see the logo in my application when i use DarkActionBar style.

my style file looks like this

    <!-- the theme applied to the application or activity -->
<style name="AppTheme"
    parent="@style/Theme.AppCompat.Light.DarkActionBar">
    <item name="android:actionBarStyle">@style/MyActionBar</item>

    <!-- Support library compatibility -->
    <item name="actionBarStyle">@style/MyActionBar</item>
</style>

and in the manifest i have:

   <application
    android:allowBackup="true"
    android:icon="@drawable/logo"
    android:label="@string/title_activity_main"
    android:theme="@style/AppTheme" >

thanks for help..