I tried on the emulator. I'm getting a sound when I go to the first and second zones (the second one is "Hospoda").
Did you hear them or not at all? (If not, there might be something wrong with your phone. Maybe not enough memory left in the isolated storage? If yes, then I need more instructions from you to reproduce the bug.)
I did not hear them at all. I even tried to replay them after finishing the cache and couldn't hear anything.
Sounds to me like the cache wasn't built for this file on your phone. It could be that you don't have enough storage left? Can you check?
I have more than 1GB of storage left. Maybe it is the phone issue. I will try some other cartridge and will see.
10 minutes later and the audio files are working.