탭위젯으로 위젯을 꾸며 봤는데 오류내용이

01-02 17:01:37.989: ERROR/AndroidRuntime(863): FATAL EXCEPTION: main
01-02 17:01:37.989: ERROR/AndroidRuntime(863): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{kr.mobileplace.lecture/kr.mobileplace.lecture.Main}: java.lang.ClassNotFoundException: kr.mobileplace.lecture.Main in loader dalvik.system.PathClassLoader[/data/app/kr.mobileplace.lecture-2.apk]
01-02 17:01:37.989: ERROR/AndroidRuntime(863):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
01-02 17:01:37.989: ERROR/AndroidRuntime(863):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
01-02 17:01:37.989: ERROR/AndroidRuntime(863):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
01-02 17:01:37.989: ERROR/AndroidRuntime(863):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
01-02 17:01:37.989: ERROR/AndroidRuntime(863):     at android.os.Handler.dispatchMessage(Handler.java:99)
01-02 17:01:37.989: ERROR/AndroidRuntime(863):     at android.os.Looper.loop(Looper.java:123)
01-02 17:01:37.989: ERROR/AndroidRuntime(863):     at android.app.ActivityThread.main(ActivityThread.java:4627)
01-02 17:01:37.989: ERROR/AndroidRuntime(863):     at java.lang.reflect.Method.invokeNative(Native Method)
01-02 17:01:37.989: ERROR/AndroidRuntime(863):     at java.lang.reflect.Method.invoke(Method.java:521)
01-02 17:01:37.989: ERROR/AndroidRuntime(863):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
01-02 17:01:37.989: ERROR/AndroidRuntime(863):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
01-02 17:01:37.989: ERROR/AndroidRuntime(863):     at dalvik.system.NativeStart.main(Native Method)
01-02 17:01:37.989: ERROR/AndroidRuntime(863): Caused by: java.lang.ClassNotFoundException: kr.mobileplace.lecture.Main in loader dalvik.system.PathClassLoader[/data/app/kr.mobileplace.lecture-2.apk]
01-02 17:01:37.989: ERROR/AndroidRuntime(863):     at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
01-02 17:01:37.989: ERROR/AndroidRuntime(863):     at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
01-02 17:01:37.989: ERROR/AndroidRuntime(863):     at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
01-02 17:01:37.989: ERROR/AndroidRuntime(863):     at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
01-02 17:01:37.989: ERROR/AndroidRuntime(863):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)

이렇게 나옵니다. 어플의 실행이 종료되는데 지금로그캣을 보면 어느부분을 보고 어떻게 고쳐야 하는지 좀부탁드립니다..
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