Android, onCreateOptionsMenu not firing?

Question

Android

In general, a simple example:

package com.example;<br/>
<br/>
import android.app.Activity;<br/>
import android.os.Bundle;<br/>
import android.view.Menu;<br/>
<br/>
public class MyActivity extends Activity<br/>
{<br/>
 @Override<br/>
 public void onCreate(Bundle savedInstanceState)<br/>
 {<br/>
 super.onCreate(savedInstanceState);<br/>
 setContentView(R.layout.main);<br/>
 }<br/>
<br/>
@Override<br/>
 public boolean onCreateOptionsMenu(Menu menu)<br/>
 {<br/>
 super.onCreateOptionsMenu(menu);<br/>
 menu.add(&quot;qwerty&quot;);<br/>
 return true;<br/>
 }<br/>
}<br/>

In the emulator 1.6, the menu is shown, in the emulator and the phone with 2.2 it is not shown. What could be the reason?