Locking orientation to Portrait for Android in from tiapp.xml

Hey Guys I was trying to lock orientation on portrait and portraitupside down in tiapp.xml in android 2.3 for kindle fire on titanium 2.0.1 GA2.. Can anyone please let me know where i am doing wrong. Thanks

<android xmlns:android="http://schemas.android.com/apk/res/android" >
    <manifest>
            <activity android:name=".MyprojectActivity"
            android:label="myproject" android:theme="@style/Theme.Titanium"
            android:configChanges="keyboardHidden"
            android:screenOrientation="portrait"
            >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" android:screenOrientation="portrait"/>
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
 
        <activity 
        android:name="ti.modules.titanium.facebook.FBActivity"
        android:theme="@android:style/Theme.Translucent.NoTitleBar"
        android:screenOrientation="portrait"
    />
 
        <activity android:name="org.appcelerator.titanium.TiActivity"
            android:configChanges="keyboardHidden" android:screenOrientation="portrait"/>
        <activity android:name="org.appcelerator.titanium.TiTranslucentActivity"
            android:configChanges="keyboardHidden"
            android:theme="@android:style/Theme.Translucent" android:screenOrientation="portrait"/>
        <activity android:name="org.appcelerator.titanium.TiModalActivity"
            android:configChanges="keyboardHidden"
            android:theme="@android:style/Theme.Translucent" android:screenOrientation="portrait"/>
        <activity android:name="ti.modules.titanium.ui.TiTabActivity"
            android:configChanges="keyboardHidden" android:screenOrientation="portrait"/>
        <activity android:name="ti.modules.titanium.ui.android.TiPreferencesActivity" android:screenOrientation="portrait"/>
 
        <service android:name="org.appcelerator.titanium.analytics.TiAnalyticsService"
            android:exported="false" android:screenOrientation="portrait"/>
 
    </manifest>
    </android>