Table Context Menu for Word 2010

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XML

MS-Word

I want to create a context menu for Word 2010. I'm using the code below, but doesn't work when editing a table, i.e., the context menu doesn't show when entering text inside a table cell.
I tried this with the following contextMenu idMsos: ContextMenuTable, ContextMenuTableCell, ContextMenuTableCellWhole, and ContextMenuTableCellWholeLinked; but still doesn't work.
The context menu doesn't show when editing table.

What am I doing wrong? Thanks.

XML:

<contextMenus>
      	<contextMenu idMso="ContextMenuText">
			<menuSeparator id="CMenuSeparator1" />
			button id="BtnCMenu1" label="Block Text" imageMso="TextToolMenu" visible="true" onAction="StyleBlockText" />
      	</contextMenu>
</contextMenus>

VBA:

Sub StyleBlockText(control As IRibbonControl)
    Selection.Style = ActiveDocument.Styles("My Style")
End Sub