problem

hey all.
 so im traying to use the slid animation from android sampels 2,0,1 but when i but when im Switching the UI i also wan't to start using a new class / java file insted off using the same what i have trayed is

  ViewFlipper vf = (ViewFlipper) findViewById(R.id.details);

         // Set an animation from res/anim: I pick push left in
         vf.setAnimation(AnimationUtils.loadAnimation(view.getContext(), R.anim.push_left_in));

         vf.showNext();

		startActivity(i);

but it is creashing with a null point exeception

01-06 00:20:21.373: E/AndroidRuntime(2982): FATAL EXCEPTION: main
01-06 00:20:21.373: E/AndroidRuntime(2982): java.lang.RuntimeException: Unable to start activity ComponentInfo{simon.vestergaard.note.calender/simon.vestergaard.note.calender.NoteSelector}: java.lang.NullPointerException
01-06 00:20:21.373: E/AndroidRuntime(2982): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955)
01-06 00:20:21.373: E/AndroidRuntime(2982): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980)
01-06 00:20:21.373: E/AndroidRuntime(2982): 	at android.app.ActivityThread.access$600(ActivityThread.java:122)
01-06 00:20:21.373: E/AndroidRuntime(2982): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146)
01-06 00:20:21.373: E/AndroidRuntime(2982): 	at android.os.Handler.dispatchMessage(Handler.java:99)
01-06 00:20:21.373: E/AndroidRuntime(2982): 	at android.os.Looper.loop(Looper.java:137)
01-06 00:20:21.373: E/AndroidRuntime(2982): 	at android.app.ActivityThread.main(ActivityThread.java:4340)
01-06 00:20:21.373: E/AndroidRuntime(2982): 	at java.lang.reflect.Method.invokeNative(Native Method)
01-06 00:20:21.373: E/AndroidRuntime(2982): 	at java.lang.reflect.Method.invoke(Method.java:511)
01-06 00:20:21.373: E/AndroidRuntime(2982): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
01-06 00:20:21.373: E/AndroidRuntime(2982): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
01-06 00:20:21.373: E/AndroidRuntime(2982): 	at dalvik.system.NativeStart.main(Native Method)
01-06 00:20:21.373: E/AndroidRuntime(2982): Caused by: java.lang.NullPointerException
01-06 00:20:21.373: E/AndroidRuntime(2982): 	at simon.vestergaard.note.calender.NoteSelector.initilize(NoteSelector.java:65)
01-06 00:20:21.373: E/AndroidRuntime(2982): 	at simon.vestergaard.note.calender.NoteSelector.onCreate(NoteSelector.java:53)
01-06 00:20:21.373: E/AndroidRuntime(2982): 	at android.app.Activity.performCreate(Activity.java:4465)
01-06 00:20:21.373: E/AndroidRuntime(2982): 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
01-06 00:20:21.373: E/AndroidRuntime(2982): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919)
01-06 00:20:21.373: E/AndroidRuntime(2982): 	... 11 more




this is my oncreate

protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);

	//	setContentView(R.layout.noteselectorscreen);

		initilize();
	}

	private void initilize() {
		// TODO Auto-generated method stub
		Bback =(Button)findViewById(R.id.Bback);
		Bnew =(Button)findViewById(R.id.Bnew);
		LMain =(ListView) findViewById(R.id.LnoteSelector);
		tCatagoryName=(TextView)findViewById(R.id.TcatagoryName);
		TVtopText =(TextView)findViewById(R.id.TVtopText);


		Bback.setOnClickListener(this);
		Bnew.setOnClickListener(this);
		LMain.setOnItemClickListener(this);

		aa = new FancyAdapter();
		LMain.setAdapter(aa);
		FillListDataWithData();
		String caragorynameHeader =mainClass.getSelectedCategory();
		tCatagoryName.setText(""+caragorynameHeader);
		TVtopText.setText(R.string.app_name);

	}

the app is creahing one line 65 with is Bback.setOnClickListener(this);
how can i make this work??