Fatal error when running my android app

Bonjour,

Je reçois ces erreurs lorsque j'exécute mon projet vide Android sous Eclipse IDE :

04-30 20:54:55.899: E/AndroidRuntime(21986): FATAL EXCEPTION: main

04-30 20:54:55.899: E/AndroidRuntime(21986): java.lang.RuntimeException: Unable to instantiate activity
ComponentInfo{com.example.inventis/com.example.inventis.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "com.example.inventis.MainActivity" on path: /data/app/com.example.inventis-1.apk

04-30 20:54:55.899: E/AndroidRuntime(21986): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)

04-30 20:54:55.899: E/AndroidRuntime(21986): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2309)

04-30 20:54:55.899: E/AndroidRuntime(21986): at android.app.ActivityThread.access$700(ActivityThread.java:157)

04-30 20:54:55.899: E/AndroidRuntime(21986): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1289)

04-30 20:54:55.899: E/AndroidRuntime(21986): at android.os.Handler.dispatchMessage(Handler.java:99)

04-30 20:54:55.899: E/AndroidRuntime(21986): at android.os.Looper.loop(Looper.java:176)

04-30 20:54:55.899: E/AndroidRuntime(21986): at android.app.ActivityThread.main(ActivityThread.java:5317)

04-30 20:54:55.899: E/AndroidRuntime(21986): at java.lang.reflect.Method.invokeNative(Native Method)

04-30 20:54:55.899: E/AndroidRuntime(21986): at java.lang.reflect.Method.invoke(Method.java:511)

04-30 20:54:55.899: E/AndroidRuntime(21986): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)

04-30 20:54:55.899: E/AndroidRuntime(21986): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)

04-30 20:54:55.899: E/AndroidRuntime(21986): at dalvik.system.NativeStart.main(Native Method)

04-30 20:54:55.899: E/AndroidRuntime(21986): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.inventis.MainActivity" on path: /data/app/com.example.inventis-1.apk

04-30 20:54:55.899: E/AndroidRuntime(21986): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65)

04-30 20:54:55.899: E/AndroidRuntime(21986): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)

04-30 20:54:55.899: E/AndroidRuntime(21986): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)

04-30 20:54:55.899: E/AndroidRuntime(21986): at android.app.Instrumentation.newActivity(Instrumentation.java:1071)

04-30 20:54:55.899: E/AndroidRuntime(21986): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2171)

04-30 20:54:55.899: E/AndroidRuntime(21986): ... 11 more

Merci de me répondre et m'aider à régler ce problème !