ClassNotFound exceptionin Android

I follow the document to create a mobile app:

1 - In moblie select enable Android Deployment

2 - restart

3 - disable Compile on save

i doesnot work.for a try i add library jme3-android but nothing change.

Did i miss something?

console output

[java]me: FATAL EXCEPTION: main

04-04 01:24:07.217 2045 2045 E AndroidRuntime: java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.mycompany.mygame/com.mycompany.mygame.MainActivity}: java.lang.ClassNotFoundException: com.mycompany.mygame.MainActivity in loader dalvik.system.PathClassLoader[/data/app/com.mycompany.mygame-2.apk]

04-04 01:24:07.217 2045 2045 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2675)

04-04 01:24:07.217 2045 2045 E AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2769)

04-04 01:24:07.217 2045 2045 E AndroidRuntime: at android.app.ActivityThread.access$2500(ActivityThread.java:129)

04-04 01:24:07.217 2045 2045 E AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2117)

04-04 01:24:07.217 2045 2045 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:99)

04-04 01:24:07.217 2045 2045 E AndroidRuntime: at android.os.Looper.loop(Looper.java:143)

04-04 01:24:07.217 2045 2045 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:4717)

04-04 01:24:07.217 2045 2045 E AndroidRuntime: at java.lang.reflect.Method.invokeNative(Native Method)

04-04 01:24:07.217 2045 2045 E AndroidRuntime: at java.lang.reflect.Method.invoke(Method.java:521)

04-04 01:24:07.217 2045 2045 E AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)

04-04 01:24:07.217 2045 2045 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

04-04 01:24:07.217 2045 2045 E AndroidRuntime: at dalvik.system.NativeStart.main(Native Method)

04-04 01:24:07.217 2045 2045 E AndroidRuntime: Caused by: java.lang.ClassNotFoundException: com.mycompany.mygame.MainActivity in loader dalvik.system.PathClassLoader[/data/app/com.mycompany.mygame-2.apk]

04-04 01:24:07.217 2045 2045 E AndroidRuntime: at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)

04-04 01:24:07.217 2045 2045 E AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:573)

04-04 01:24:07.217 2045 2045 E AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:532)

04-04 01:24:07.217 2045 2045 E AndroidRuntime: at android.app.Instrumentation.newActivity(Instrumentation.java:1021)

04-04 01:24:07.217 2045 2045 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2667)

04-04 01:24:07.217 2045 2045 E AndroidRuntime: … 11 more

04-04 01:24:07.225 1339 1344 W ActivityManager: Force finishing activity com.mycompany.mygame/.MainActivity[/java]

yeah, the sticky post: http://hub.jmonkeyengine.org/groups/android/forum/topic/android-sdk-r17-libs-folder-issue/