Android: showAsAction = "ifRoom" doesn't work when using ActiobarSherlock

I have the following menu.xml structure:

<menu xmlns:android="http://schemas.android.com/apk/res/android" >
    <item
        android:id="@+id/menu_button_1"
        android:icon="@drawable/menu1"
        android:showAsAction="ifRoom"
        android:title="@string/s1"/>
    <item
        android:id="@+id/menu_button_2"
        android:icon="@drawable/menu2"
        android:showAsAction="ifRoom"
        android:title="@string/s1">
    </item>
</menu>
@Override
    public boolean onCreateOptionsMenu(com.actionbarsherlock.view.Menu menu) {
        // TODO Auto-generated method stub
        com.actionbarsherlock.view.MenuInflater inflater =getSupportMenuInflater();
        inflater.inflate(R.menu.main_menu, menu);
        return true;

    }

      

        
        
        
      

    

If the action bar title is longer, the menu items are not hidden, but the ActionBar text becomes shorter. Instead of this ActionBarTitle I get something like ActionBarT ... I tried adding android: showAsAction = "ifRoom" to the elements, but nothing changes. How do I get the menu symbols to hide if there is no room for the ActioBar title? thank