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[cdt-dev] Small question regarding the article "How to extend DSF-GDB"

Good day,
I am writing to you because I tried to follow the instructions [here: http://wiki.eclipse.org/CDT/cdt-debug-dsf-gdb-extensibility] for adding a new command to gdb while using cdt eclipse.
I does not seem to work at all. I put print statements in all of the methods of all the extended classes. Nothing gets printed, which indicates that none of these methods are called. Following is my code. What am I missing?
(i didn't get to the point of actually implementing the new services factory since i there is no point until i figure out how to make eclipse invoke MyTracerLaunchDelegate delegate).
//################################################################
plugin.xml:
<plugin>
  <extension
         point="org.eclipse.debug.core.launchDelegates">
      <launchDelegate
            delegate="tracerdubug.MyTracerLaunchDelegate"
            id="TracerDubug.MyTracerLaunchDelegate"
            modes="debug, run">
      </launchDelegate>
   </extension>
</plugin>
//################################################################
TracerRunControl
public class TracerRunControl extends GDBRunControl_7_0 {

    /**
     * 
     */
    public TracerRunControl(DsfSession session) {
        super(session);
        System.out.println("TracerRunControl");
    }
    
}
//################################################################
MyTracerLaunchDelegate
public class MyTracerLaunchDelegate extends GdbLaunchDelegate implements ILaunchConfigurationDelegate2{

    public MyTracerLaunchDelegate() {
        super();
        System.out.println("MyTracerLaunchDelegate::ctr()");
    }

    
    @Override
    public void launch( ILaunchConfiguration config, String mode, ILaunch launch, IProgressMonitor monitor ) throws CoreException {
        System.out.println("MyTracerLaunchDelegate::launch()");       
super.launch(config, mode, launch, monitor);      
    }
    
    
    @Override
    protected IDsfDebugServicesFactory newServiceFactory(String version) {
        System.out.println("MyTracerLaunchDelegate");
        return new TracerDebugServicesFactory(version);
    }
}
//################################################################ 
TracerDebugServicesFactory
public class TracerDebugServicesFactory extends GdbDebugServicesFactory {

    public TracerDebugServicesFactory(String version) {
        super(version);
        // TODO Auto-generated constructor stub
    }
    
    @Override
    protected ICommandControl createCommandControl(DsfSession session, ILaunchConfiguration config) {
        GDBControl_7_0 g = new GDBControl_7_0(session,config);
        System.out.println("TracerDebugServicesFactory::createCommandControl");
        return g;
    }
    
    @Override
    protected IRunControl createRunControlService(DsfSession session) {
        System.out.println("TracerDebugServicesFactory::createProcessesService");
        return new TracerRunControl(session);   
    }

    @Override
    protected IProcesses createProcessesService(DsfSession session) {
        System.out.println("TracerDebugServicesFactory::createProcessesService");
       return new GDBProcesses_7_0(session);
    }
}

Thanks,
Shai