Sounds not playing!

Okay so I don't know if it's something to do with my project or not, but sounds are not playing at all. They used to! Then I changed the sounds I was using and they stopped working. Upon changing them back to the old sounds, they're still not working. I managed to get some music playing (After a 5 second delay every time). But I just cannot get any sounds to play! Both in testing and upon export. Can anyone help?

If the sound is not working when you export it, it might be some limitation of the device, you should test it in many different platforms. However if the song is not working when you test it, it might be something wrong in you project.

Can you try to upload your game capx so we can see what's going on?

Okay so after more playing around I managed to get my old sounds playing but my new ones are not. Must be an issue with the sounds themselves.