Seems to only be occurring on my Windows Server 2012 R2 systems... Clicking "Send Events" gives me an error in the Agent Monitor of "Agent failed to send events".
Also seems like the "Check New Policies" button does not work, either.
All of these functions are fine on my Windows Server 2008 R2 systems.
(These are my development and testing systems).
Have u tried uninstalling and reinstalling the agent? Not to mention waking up the agent from the ePO?