Video plays but no audio

Im quite new to this so please my ignorance but it won't play the audio when in the media window. It will load to my Indesign page that I'm working on.Ive tried it with Interactive for PDF and essentials.So its not playing for me on the screen while I'm working with the material.I have tried other video clips and it works though this particular one i have embedded a different audio track using Cubase and have exported it as mp4 but for some reason it doesn't like it. This same clip with the altered audio track will play in quick time and the other adobe products i mentioned but it won't play the audio in Indesign. Like i said if i import a video clip i haven't altered into Indesign it works.Just don't know why the altered clip won't work in Indesign when it does in the other adobe products.Im not sure if i have answered your question properly.