IE 11 Title Attribute Tooltip

I've created an image map and am trying to get a tooltip when hovering over the displayed areas. I know IE requires the use of the title attribute. I've constructed what seems to work fine in Chrome, but there is no tooltip in the code below other than the one marked with "test6":

<map name="Map" id="Map">
    <area alt="test" title="test" href="#" shape="poly" coords="52,294.75,90.8599853515625,295.32000732421875,134.8599853515625,333.6099853515625,136.57000732421875,403.8900146484375,6.2899932861328125,402.75,8,333.02996826171875" />
    <area alt="test2" title="test2" href="#" shape="poly" coords="191.42999267578125,294.17999267578125,230.28997802734375,294.17999267578125,276,332.4599609375,277.1399841308594,402.17999267578125,146.28997802734375,403.8900146484375,144,331.32000732421875" />
    <area alt="test3" title="test3" href="#" shape="poly" coords="332,295.32000732421875,372.57000732421875,293.6099853515625,416,333.6099853515625,417.1400146484375,405.6099853515625,288,402.17999267578125,285.7099914550781,332.4599609375" />
    <area alt="test4" title="test4" href="#" shape="poly" coords="472.57000732421875,294.17999267578125,514.8599853515625,294.17999267578125,559.4299926757812,334.75,558.2899780273437,403.8900146484375,430.28997802734375,404.4599609375,428.57000732421875,332.4599609375" />
    <area alt="test5" title="test5" href="#" shape="poly" coords="613.1399536132812,295.32000732421875,653.7099609375,295.8900146484375,699.4299926757812,334.75,700,402.75,570.2899780273437,403.8900146484375,568.5700073242187,331.8900146484375" />
    <area alt="test6" title="test6" href="#" shape="rect" coords="272,85.02999877929687,448.57000732421875,149.02999877929687" />
</map>

      

        
        
        
      

    

Is there something else I am missing here? They all work great in chrome.