@supersz
try to check the language settings in street pilot app if the voices are recognized from your files. if you can see any of those files in the language menu, then perhaps you have to play around with your volume rocker on your phone. there is a glitch on the volume on this one. everytime you start the program, the volume goes down that you can't hear. you have to raise it manually all the time from the start, at least that's happening to me.