Adobe Air vertical scroll for rich text

I have a rich text component with large amount of text. How to add vertical scrollbar to it?

I tried:

<mx:Canvas width="100%" height="100%" verticalScrollBar="vsb">
    <s:RichText id="text" width="100%" height="100%" maxDisplayedLines="-1"/>
</mx:Canvas>
<s:VScrollBar id="vsb" height="100%"/>

But it get error: Initializer for 'verticalScrollBar': values of type mx.controls.scrollClasses.ScrollBar cannot be represented i开发者_高级运维n text.

Reading the docs on RichText, I see this:

For performance reasons, it does not support scrolling, selection, editing, clickable hyperlinks, or images loaded from URLs. If you need those capabilities, please see the RichEditableText class.

So, going with a RichEditableText (and setting its editable property to false, this works for me with FlashBuilder 4.5. Note: I set the Scroller height to 200 and added lots of text to force a scrollbar to appear)

<mx:Canvas width="100%" height="100%">  
    <s:Scroller width="100%" height="200">
       <s:RichEditableText percentWidth="100" percentHeight="100" editable="false">
      <!-- add lots of text here to introduce a scrollbar -->       
       </s:RichEditableText>
    </s:Scroller>
</mx:Canvas>