[flexcoders] meaning of the this AIR error message

[hworke]

  Hi,

  I was trying mx:HTML inside a viewstack and got this error
   message:

   =============================================================

       TypeError: Error #1034: Type Coercion failed: cannot convert
mx.controls::[EMAIL PROTECTED] to mx.core.Container.

   Here is my code:

   ==============================================================

   <mx:ViewStack id="myVS" height="100%" width="80%">
     <mx:Canvas width="100%" height="100%         
       <mx:HTML id="myHTML" location="{st}" height="100%" width="100%"/>
     </mx:Canvas>
    </mx:ViewStack> 

   ===============================================================

    What is the meaning of this error message and does it
    mean that we cannot put a mx:HTML inside a viewstack?

    Regards...