Help. Can't mirror display with ios7, ipad 2, hdmi converter to tv.

Recently updated to newest OS 7.0.2 on my ipad. For a presentation I need Keynote to be viewed on a tv with hdmi converter and hdmi cable. When I plug in and push play to test any videos or keynote nothing is mirrored to the tv. I did some research and found that changing the language did allow the ipad to be mirrored successfully but when I unplugged the hdmi dongle from the iPad and back in again it didn't work again. Even after trying the language switch again still didn't work. Also restarted the ipad multiple times, nothing works. When I plug the hdmi dongle a blue bar does appear on the top of my ipad which means it is connected and the tv does display the input as active. Please help, it makes no sense.