'G_vmlCanvasManager' is undefined

I am using the highcharts charting library,

i am including excanvas if the browser is ie using

<!-开发者_如何转开发-[if IE]>
    <script type="text/javascript" src="<script type="text/javascript" src="excanvas.compiled.js"></script>
<![endif]--> 

yet i still get 'G_vmlCanvasManager' is undefined

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is it a typo?

yours is

<!--[if IE]>
    <script type="text/javascript" src="<script type="text/javascript" src="excanvas.compiled.js"></script>
<![endif]--> 

should it be?

<!--[if IE]>
    <script type="text/javascript" src="xcanvas.compiled.js"></script>
<![endif]--> 

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I also get this error. It was a I was referencing 'G_vmlCanvasManager' in my javascript instead of 'window.G_vmlCanvasManager'