Ich kann keine Activities starten

package de.jaiel.activities;

import de.jaiel.surfaceviews.MainMenuView;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;


public class MainMenuActivity extends Activity {
	
	MainMenuView mMView;

		
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		mMView=new MainMenuView(this);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
        					 WindowManager.LayoutParams.FLAG_FULLSCREEN);
		setContentView(mMView);

		Intent intent=new Intent(this,PlayMenuActivity.class);
    		startActivity(intent);
		
	}
	

}

package de.jaiel.activities;

import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;


public class PlayMenuActivity extends Activity{
	
	PlayMenuView pMView;

	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		pMView=new PlayMenuView(this);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
        					 WindowManager.LayoutParams.FLAG_FULLSCREEN);
		setContentView(pMView);
//		pMView.startPlayMenuThread();
		
	}
	
	@Override
	protected void onResume()
	{
//		pMView.startPlayMenuThread();
	}
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="de.jaiel.activities"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="12" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/icon"
        android:theme="@android:style/Theme.NoTitleBar"
        android:label="Haha">
        
        <activity
            android:name=".MainMenuActivity"
       		android:theme="@android:style/Theme.NoTitleBar" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        
        <activity
            android:name=".PlayMenuActivity"
       		android:theme="@android:style/Theme.NoTitleBar">
        </activity>
        
        <activity
            android:name=".MarketMenuActivity"
       		android:theme="@android:style/Theme.NoTitleBar">
        </activity>
        
        <activity
            android:name=".CharacterMenuActivity"
       		android:theme="@android:style/Theme.NoTitleBar">
        </activity>
        
    </application>

</manifest>