[xwiki-users] How do I upgrade sub-Wikis to 2.4 in a XEM farm?

We upgraded our XEM farm today from 2.3 to 2.4. All upgraded were successful to the main wiki. I can see the new "Template", "Invitation", and "Search" in the Administer UI inside the main Wiki. But I don't see it in any of these inside the sub-xwiki in the farm. Is there a additional process to make it effect to the Wikis in the farm? Cheers, WEsley