The second list in the fragment list does not scroll

I created an application that has two snippets, and both snippets have listviews. The first list in fragment1 gets a scroll, and items are also highlighted. But in the second fragment the list does not scroll, and even the elements are not highlighted. Can someone tell me what the problem is? The thing is, I just checked this by putting the same fragment class on both fragments in xml. Either they should both work, or both should not, because they are no different from each other. But why does this problem arise?

My fragment class:

public class Fragment1 extends ListFragment{

    String[] countries = new String[] {
        "India",
        "Pakistan",
        "Sri Lanka",
        "China",
        "Bangladesh",
        "Nepal",
        "Afghanistan",
        "North Korea",
        "South Korea",
        "Japan"
    };

    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
        return inflater.inflate(R.layout.fragment1,container,false);
    }
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        ArrayAdapter<String> adapter=new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1,countries);
        setListAdapter(adapter);
    }

    public void onListItemClick(ListView parent, View v,int position, long id)
    {
        Toast.makeText(getActivity(), "You have selected "+countries[position], Toast.LENGTH_SHORT).show();
    }

}

main.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <fragment
        android:name="com.example.listfragmentexample.Fragment1"
        android:id="@+id/fragment1"
        android:layout_weight="0.5"
        android:layout_width="0dp"
        android:layout_height="200dp" />

    <fragment 
        android:name="com.example.listfragmentexample.Fragment1"
        android:id="@+id/fragment2"
        android:layout_weight="0.5"
        android:layout_width="0dp"
        android:layout_height="300dp"/>
</LinearLayout>

fragment1.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <ListView
        android:id="@id/android:list"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:drawSelectorOnTop="false"/>

</LinearLayout>