NI9265 - data queue not looping

Try as I might, I can't seem to get my module to loop through a set of data points continuously. I've made the code exactly as the demo's and session.m file describe, but to no avail. Anyone know what I'm missing??

    clear;
    s = daq.createSession('ni');
    s.addAnalogOutputChannel('cDAQ9191-1629439Mod1',1,'Current');
    outputData = linspace(0,.02,2200)';
    s.IsContinuous=true;
    lh = addlistener(s,'DataRequired',@queueMoreData);
    s.queueOutputData(outputData);
    s.startBackground;
    s.stop;
    delete(lh)

in a seperate m file I have this:

    function queueMoreData(src,event)
          s.queueOutputData(linspace(0,.02,2200)');
    end

I run each of the cells individually (ctrl+enter). Each time, the code runs and the module ramps it's current output and then holds at it's last value. I want it to cycle through a few more times, but I can't seem to get this to work properly.

Thanks for your help in advance.

Nate