Volume mixer automatically mutes game

[yeah1526]

I am running a game (3d movie maker) and the Volume mixer has set the sound right down to 0.
So I put the volume back up, but as soon as I click back to the game, the volume goes right back down again.
I've read similar problems, but this isn't related to running multiple applications. This only happens with this one game. And this problem happened randomly, after I put the volume down myself. After that one occasion I haven't been able to fix it.
Communications setting is set to "do nothing" and I have played with options allowing applications exclusive control of volume mixer.
Any ideas please?

 

[fireberd]

Is this an old game or one designed for newer OS such as Win 7? Reason I ask, Vista/Win 7/Win 8 handle some audio functions differently than XP and earlier.

Also, Please fill in the "My System Specs". Helps us to help you. And finally, what sound drivers are you using? The ones from the PC vendor (or motherboard vendor on a custom build) or some other drivers such as the generic Windows installed HD Audio Codec?