Warum funktioniert das "res/layout-land" nicht?

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10-28 09:36:43.711: ERROR/AndroidRuntime(405): FATAL EXCEPTION: main
10-28 09:36:43.711: ERROR/AndroidRuntime(405): java.lang.RuntimeException: Unable to start activity ComponentInfo{de.wei.app/de.wei.app.MyActivity}: android.content.res.Resources$NotFoundException: Resource ID #0x7f030000
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at android.os.Handler.dispatchMessage(Handler.java:99)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at android.os.Looper.loop(Looper.java:123)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at android.app.ActivityThread.main(ActivityThread.java:4627)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at java.lang.reflect.Method.invokeNative(Native Method)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at java.lang.reflect.Method.invoke(Method.java:521)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at dalvik.system.NativeStart.main(Native Method)
10-28 09:36:43.711: ERROR/AndroidRuntime(405): Caused by: android.content.res.Resources$NotFoundException: Resource ID #0x7f030000
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at android.content.res.Resources.getValue(Resources.java:892)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at android.content.res.Resources.loadXmlResourceParser(Resources.java:1869)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at android.content.res.Resources.getLayout(Resources.java:731)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at android.view.LayoutInflater.inflate(LayoutInflater.java:318)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at android.app.Activity.setContentView(Activity.java:1647)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at de.wei.app.MyActivity.onCreate(MyActivity.java:16)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
10-28 09:36:43.711: ERROR/AndroidRuntime(405):     ... 11 more
10-28 09:36:43.762: WARN/ActivityManager(60):   Force finishing activity de.wei.app/.MyActivity
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