Sound

Its an awesome game...However Im having challenges with the sound.. Ive just installed it on my iPad and tried playing it, but then theres no sound. It shows me a music icon and makes me play songs on my iPad instead of playing the Modern combat game sounds with gun shots sounds .from the escape in prison stage 1. Please I want to if the game was programmed that way?

Ninobillion200 about Modern Combat 2: Black Pegasus HD, v1.2.6