Admob error in Eclipse? - Android

Eclipse is showing an error in android:configChanges line in my AndroidManifest.xml:

<activity android:name="com.google.ads.AdActivity"
              android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"></activity>

and the error is,

error: Error: String types not allowed (at 'configChanges' with value 'keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize').

I resolved it by setting target=android-13 in project.properties file.. After changing it don't forget to do Project-> Clean 

If you would like to know how to make use of Admob in your Android app, you can take a look at this tutorial..

http://www.monkeycoder.co.nz/Community/posts.php?topic=1121