Have you tried to activate the screen mirroring?
It is assumed that the last update Yomvi not allowed to watch content on TV by AirPlay or by physical connector but no other duplication activating screen ........
Me on my iphone 5 have not updated itself I found the same problem.
In the ipad if I updated and I can not see Yomvi on TV but it is no problem because I have iOS update or 7 and compatibility issues