Internal microphone not working ( iPad with retina ios7)

When I was starting the software for the first time, there was a "search for microphones" that came up. I mistakenly pressed no. The microphone does not work even when I select the input 1 mono. I tried removing the app and reloading, but now the prompt for microphone search does not come up at the beginning of launching the software. Not sure what to do? Thanks for any suggestions!