admobのSDKを更新して、
アプリのソースコードも少し改変してUPしたらエラーが出て困っています。
なにとぞ助言お願いします。

例外クラス
java.lang.ClassNotFoundException
例外発生メソッド
PathClassLoader.findClass()

java.lang.RuntimeException: Unable to instantiate receiver com.admob.android.ads.analytics.InstallReceiver
: java.lang.ClassNotFoundException: com.admob.android.ads.analytics.InstallReceiver in loader dalvik.system.PathClassLoader[/data/app/com.myapp1.apk]
at android.app.ActivityThread.handleReceiver(ActivityThread.java:2913)
at android.app.ActivityThread.access$3200(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2198)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:144)
at android.app.ActivityThread.main(ActivityThread.java:4937)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassNotFoundException: com.admob.android.ads.analytics.InstallReceiver in loader dalvik.system.PathClassLoader[/data/app/com.myapp-1.apk]
at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
at android.app.ActivityThread.handleReceiver(ActivityThread.java:2904)