Win7HP allows you to set a few things.

1. In the small tray bottom right is a sound icon. This is the general output level.
2. If you right click on this it often shows you the options menu for sound which will give you the ability to modify a specific application relative to the others. This is usually where the disconnect occurs.

Have a peek at this and see if you can find them.

Everyone loves a Morgan. Even me, unless it's broken again.