I'm trying to use le lib SlidingMenu in my app but i'm having some problems. I'm getting this error:

11-04 15:50:46.225: E/FragmentManager(21112): No view found for id 0x7f040009 (com.myapp:id/menu_frame) for fragment SampleListFragment{413805f0 #0 id=0x7f040009}

BaseActivity.java

package com.myapp;

import android.support.v4.app.FragmentTransaction;
import android.os.Bundle;

import android.support.v4.app.ListFragment;

import android.view.Menu;
import android.view.MenuItem;

import com.jeremyfeinstein.slidingmenu.lib.SlidingMenu;
import com.jeremyfeinstein.slidingmenu.lib.app.SlidingFragmentActivity;

public class BaseActivity extends SlidingFragmentActivity {
    private int mTitleRes;
    protected ListFragment mFrag;

    public BaseActivity(int titleRes) {
        mTitleRes = titleRes;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setTitle(mTitleRes);

        // set the Behind View
        setBehindContentView(R.layout.menu_frame);
        if (savedInstanceState == null) {
            FragmentTransaction t = this.getSupportFragmentManager().beginTransaction();
            mFrag = new SampleListFragment();
            t.replace(R.id.menu_frame, mFrag);
            t.commit();
        } else {
            mFrag = (ListFragment) this.getSupportFragmentManager().findFragmentById(R.id.menu_frame);
        }

        // customize the SlidingMenu
        SlidingMenu slidingMenu = getSlidingMenu();
        slidingMenu.setMode(SlidingMenu.LEFT);
        slidingMenu.setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);
        slidingMenu.setShadowWidthRes(R.dimen.slidingmenu_shadow_width);
        slidingMenu.setShadowDrawable(R.drawable.slidingmenu_shadow);
        slidingMenu.setBehindOffsetRes(R.dimen.slidingmenu_offset);
        slidingMenu.setFadeDegree(0.35f);
        slidingMenu.setMenu(R.layout.slidingmenu);

        getActionBar().setDisplayHomeAsUpEnabled(true);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
            switch (item.getItemId()) {
            case android.R.id.home:
                    toggle();
                    return true;
            }
            return super.onOptionsItemSelected(item);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
}

menu.xml

<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    android:name="com.myapp.SampleListFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
</fragment>

menu_frame.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/menu_frame"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

SampleListFragment.java

package com.myapp;

import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class SampleListFragment extends ListFragment {

    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.list, null);
    }

    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        SampleAdapter adapter = new SampleAdapter(getActivity());
        for (int i = 0; i < 20; i++) {
            adapter.add(new SampleItem("Sample List", android.R.drawable.ic_menu_search));
        }
        setListAdapter(adapter);
    }

    private class SampleItem {
        public String tag;
        public int iconRes;
        public SampleItem(String tag, int iconRes) {
            this.tag = tag; 
            this.iconRes = iconRes;
        }
    }

    public class SampleAdapter extends ArrayAdapter<SampleItem> {

        public SampleAdapter(Context context) {
            super(context, 0);
        }

        public View getView(int position, View convertView, ViewGroup parent) {
            if (convertView == null) {
                convertView = LayoutInflater.from(getContext()).inflate(R.layout.row, null);
            }
            ImageView icon = (ImageView) convertView.findViewById(R.id.row_icon);
            icon.setImageResource(getItem(position).iconRes);
            TextView title = (TextView) convertView.findViewById(R.id.row_title);
            title.setText(getItem(position).tag);

            return convertView;
        }

    }
}

MainActivity.java

package com.myapp;

import java.util.ArrayList;


import beans.Tweet;

import database.DatabaseHelper;

import adapters.TweetListViewAdapter;
import android.os.Bundle;
import android.widget.ListView;

public class MainActivity extends BaseActivity {

    public MainActivity(){
        super(R.string.app_name);
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        final ListView listview = (ListView) findViewById(R.id.listview_tweets);

        DatabaseHelper db = new DatabaseHelper(this);
        ArrayList<Tweet> tweets = db.getAllTweets();

        TweetListViewAdapter adapter = new TweetListViewAdapter(this, R.layout.listview_item_row, tweets);
        listview.setAdapter(adapter);

        setSlidingActionBarEnabled(false);
    }
}

I don't understand why the view menu_frame is not found because I have a view with the id menu_frame and this view is a child of the layout menu_frame.