adding second listener to programm with 1 listener

Hi, could you help me.. I wantto add a second listener(first one Switch1 Output, second Switch2 Output) to function like this: http://techsource-asia.com/edm/2011Aug/tips1.html

This is function for 1 listener:

    function SampleFunction
    ModelName = 'zbuferem';

    % Opens the Simulink model
    open_system(ModelName);

    % Simulink may optimise your model by integrating all your blocks. To
    % prevent this, you need to disable the Block Reduction in the Optimisation
    % settings.
    set_param(ModelName,'BlockReduction','off');

    % When the model starts, call the localAddEventListener function
    set_param(ModelName,'StartFcn','localAddEventListener');

    % Start the model
    set_param(ModelName, 'SimulationCommand', 'start');

    % Create a line handle
     global ph;
     ph = line([0],[0]);
    end
    % When simulation starts, Simulink will call this function in order to
    % register the event listener to the block 'SineWave'. The function
    % localEventListener will execute everytime after the block 'SineWave' has
    % returned its output.
    function eventhandle = localAddEventListener

    eventhandle = add_exec_event_listener('zbuferem/Switch1', ...
                                            'PostOutputs', @localEventListener);
    end
    % The function to be called when event is registered.
    function localEventListener(block, eventdata)

    disp('Event has occured!')
    global ph;
    %nn1 = block.NumOutputPorts %you've set this to 1 
    % Gets the time and output value
    gather=[];
    simTime = block.CurrentTime
    simData = block.OutputPort(1).Data
    %simData2 = block.OutputPort(2).Data; 
    % Gets handles to the point coordinates
    xData = get(ph,'XData');
    yData = get(ph,'YData');
    gather = yData

    n = 2000;

        xData = [xData simTime];
        yData = [yData simData(1)];

    % Update point coordinates

    set(ph,...
        'XData',xData,...
        'YData',yData);

    % The axes limits need to change as you scroll
    samplingtime = .01;

    %Sampling time of block 'SineWave'
    offset = samplingtime*n;
    xLim = [max(0,simTime-offset) max(offset,simTime)];
    set(gca,'Xlim',xLim);
    drawnow;
    end

I want to listen to Switch1 Output and Switch2 Output and then I'd like to have one chart for each signal. I tried it in many ways but it still doesnt work.

so I tried to add the second listener

    eventhandle{1}= add_exec_event_listener('zbuferem/Switch1', ...
                                            'PostOutputs', @localEventListener);
    eventhandle{2} = add_exec_event_listener('zbuferem/Switch2', ...
                                            'PostOutputs', @localEventListener);

and then to make global ph2, but how can I determine this: now listen to eventhandle1 and update the lines, stop this and listen to eventhandle2...

I tried to add

    disp('Event has occured!')
    viewing(1).blockHandle = get_param('zbuferem/Switch1','Handle');
    ph=lineHandles(viewing{1}.blockHandle)

before

global ph;

and also to delete eventlistener1 after..

but I did smth wrong or do you have any idea

thank you, greetings