SoundEffect = No Sound

Hello,
I have created simple android project to test audio playing.
I use SoundEffect to play sounds.
I tried XNB and WAV files. Nothing works… No sound.

Can someone explain me how to play sounds on android?

ps: My test project https://onedrive.live.com/redir?resid=B594D08BCAA8DF92!11762&authkey=!AO2DUMfbdX_6rec&ithint=file%2Czip

Yesterday, I got updated versions of xamarin and monogame.
And problems with sounds are gone.