Audio Error...

Hello all! First off, I would like to say how awesome TGE is....I just downloaded 1.4....however I am having an issue here. I created a simple demo level, and added a weapon to the player, but there is no sound from the explosion. This is the error that I get from the console:

Object 'AudioDefault3d' is not a member of the 'AudioDescription' data block class

I have compared the source to the FPS starter code, and it is exactly the same....Anyone have any idea why this is happening? Or what I should check?

Thanks for all of your help