커스텀 타이틀바 질문이요~

Question

커스텀 타이틀바 만들려는데 오류때메 질문있어요..

엑티비티 상속은 ActionBarActivity 이구요

오류는 You cannot combine custom titles with other title features 입니다

매니페스트에  android:minSdkVersion="14"     android:theme="@style/CustomActionBarTheme"  했구요

뭐가 틀렸는지 알려주시면 정말 감사하겠습니다 ㅠㅠ

MainActivity.java

		requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
		setContentView(R.layout.mainactivity);
		getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.window_title);

values / theme.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="CustomActionBarTheme" parent="@style/Theme.AppCompat">
    <item name="android:actionBarStyle">@style/MyActionBar</item>
  </style>

  <style name="MyActionBar" >
    <item name="android:background">#ffffff</item>
  </style>
</resources>