Mono for Android deployment issue

I am using MonoDroid 4.2.5 to build this simple app: <[login to view URL]> It works fine on the emulator, but when I install it on my phone, it does not work.. It runs ok, but when I click on the button, nothing happens, and the 2nd time I click it, the app shuts down/crashes .. no idea what happens .. You can MonoDroid trial version from <[login to view URL]> $25 to fix this !