[android-developers] putInt force closes

I am trying to write the system setting using:

Settings.System.putInt(getApplicationContext().getContentResolver(),
Settings.System.WIFI_SLEEP_POLICY,
Settings.System.WIFI_SLEEP_POLICY_NEVER_WHILE_PLUGGED);

But it force closes my application. Any Idea? My has user following
permissions:

<uses-permission android:name="android.permission.WRITE_SETTING"/>
<uses-permission
android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/
>
<uses-permission
android:name="android.permission.UPDATE_DEVICE_STATS"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/
>
<uses-permission android:name="android.permission.WAKE_LOCK"/>

Thanks,
JP

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