I'm trying (and failing) to add a new tab to an existing RCDC.

I've read several posts on this and I cannot figure out what I'm missing.

I insert the following code in between 2 other groupings and every time I get the message "There is an error in the Group display configuration".

<my:Grouping my:Name="NewTab" my:Caption="NewTab">
	<my:Control my:Name="NewTabText" my:TypeName="UocLabel" my:Caption="NewTabText">
		<my:Properties>
			<my:Property my:Name="Text" my:Value="!!!" />
		</my:Properties>
	</my:Control>
</my:Grouping>



I've tried this code and mild variations of this code on several RCDCs and I always get a negative result. 

Any help, thoughts appreciated.  If I do another iisreset today I might explode.

Thanks

• Edited by MS...CF 9 hours 56 minutes ago FIxed some typos