Default [Q] no tone

I don't know about the right Forum,
But I hope anyone can help me.

I hav flashed my phone with Cyanogen 11.
All works fine, until one app.

I have installed an app named Sprachbox pro from the german telephone provider telekom.
With this app I have Access to my speach box in the telekom cloud and can listen spoken Messages.
Under my old andoid 2.3 it works fine, but now I hear nothing!