admob (in a live wallpaper settings activity) crashes when clicked-Collection of common programming errors

I’ve made a live wallpaper. In the settings menu I’ve added admob. It loads ads just fine. I’ve used this tutorial http://irinaramazova.blogspot.com/2011/09/add-admob-adview-to-preferenceactivity.html.

But when i click an ad it gives me security exception saying-

01-09 14:07:25.098: E/AndroidRuntime(3907): FATAL EXCEPTION: main
01-09 14:07:25.098: E/AndroidRuntime(3907): java.lang.SecurityException: Permission Denial: starting Intent { cmp=ca.jvsh.livewallpaper/com.google.ads.AdActivity (has extras) } from ProcessRecord{2b3b5a38 3907:ca.jvsh.livewallpaper/10137} (pid=3907, uid=10137) requires android.permission.BIND_WALLPAPER
01-09 14:07:25.098: E/AndroidRuntime(3907):     at android.os.Parcel.readException(Parcel.java:1322)
01-09 14:07:25.098: E/AndroidRuntime(3907):     at android.os.Parcel.readException(Parcel.java:1276)
01-09 14:07:25.098: E/AndroidRuntime(3907):     at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:1351)
01-09 14:07:25.098: E/AndroidRuntime(3907):     at android.app.Instrumentation.execStartActivity(Instrumentation.java:1374)
01-09 14:07:25.098: E/AndroidRuntime(3907):     at android.app.Activity.startActivityForResult(Activity.java:2827)
01-09 14:07:25.098: E/AndroidRuntime(3907):     at android.app.Activity.startActivity(Activity.java:2933)
01-09 14:07:25.098: E/AndroidRuntime(3907):     at com.google.ads.AdActivity.launchAdActivity(SourceFile:257)
01-09 14:07:25.098: E/AndroidRuntime(3907):     at com.google.ads.i.shouldOverrideUrlLoading(SourceFile:134)
01-09 14:07:25.098: E/AndroidRuntime(3907):     at android.webkit.CallbackProxy.uiOverrideUrlLoading(CallbackProxy.java:224)
01-09 14:07:25.098: E/AndroidRuntime(3907):     at android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:331)
01-09 14:07:25.098: E/AndroidRuntime(3907):     at android.os.Handler.dispatchMessage(Handler.java:99)
01-09 14:07:25.098: E/AndroidRuntime(3907):     at android.os.Looper.loop(Looper.java:130)
01-09 14:07:25.098: E/AndroidRuntime(3907):     at android.app.ActivityThread.main(ActivityThread.java:3701)
01-09 14:07:25.098: E/AndroidRuntime(3907):     at java.lang.reflect.Method.invokeNative(Native Method)
01-09 14:07:25.098: E/AndroidRuntime(3907):     at java.lang.reflect.Method.invoke(Method.java:507)
01-09 14:07:25.098: E/AndroidRuntime(3907):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
01-09 14:07:25.098: E/AndroidRuntime(3907):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:624)
01-09 14:07:25.098: E/AndroidRuntime(3907):     at dalvik.system.NativeStart.main(Native Method)

This is the manifest file-

this is the live_wallpaper setting file-

This is admob preference class-

package ca.jvsh.livewallpaper;

import android.content.Context;
import android.preference.Preference;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class AdmobPreference extends Preference
{
    public AdmobPreference(Context context) {
        super(context, null);
    }

    public AdmobPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    protected View onCreateView(ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        return inflater.inflate(R.layout.admob_preference, null);
    }   

}