J'ai ces messages sur le logcat, pouvez-vous m'indiquer où est l'erreur car je ne vois rien sur mon code qui puisse la provoquer

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01-04 06:26:59.922: WARN/dalvikvm(248): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
01-04 06:26:59.942: ERROR/AndroidRuntime(248): Uncaught handler: thread main exiting due to uncaught exception
01-04 06:26:59.962: ERROR/AndroidRuntime(248): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.wtp.testlistview/com.wtp.testlistview.start}: java.lang.ClassNotFoundException: com.wtp.testlistview.start in loader dalvik.system.PathClassLoader@43ab5860
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2375)
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2470)
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     at android.app.ActivityThread.access$2200(ActivityThread.java:119)
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821)
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     at android.os.Handler.dispatchMessage(Handler.java:99)
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     at android.os.Looper.loop(Looper.java:123)
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     at android.app.ActivityThread.main(ActivityThread.java:4310)
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     at java.lang.reflect.Method.invokeNative(Native Method)
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     at java.lang.reflect.Method.invoke(Method.java:521)
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     at dalvik.system.NativeStart.main(Native Method)
01-04 06:26:59.962: ERROR/AndroidRuntime(248): Caused by: java.lang.ClassNotFoundException: com.wtp.testlistview.start in loader dalvik.system.PathClassLoader@43ab5860
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2367)
01-04 06:26:59.962: ERROR/AndroidRuntime(248):     ... 11 more
Merci pour votre aide
JCM