My Mac Pro doesn't have an option to send sound to Digital Optical.

Hello
I've recently had a problem with my Mac Pro where the sound options tab does not display an option to my digital optical audio port. I didn't notice it until I got a headset that needed that port. I figured it was probably the headsets fault, since it wasn't being very cooperative with the computer in the first place. But when I got a new headset that was made for PC and Mac, I found that the option was still not there. I've looked around, and haven't really found a similar problem or solution.
I am running an early Mac Pro 2008 dual Quad Core @ 2.23GHz. I have 14GB of Ram installed, and run an ATI 5870.
Also, I have tested the headset on the Windows side of my computer, and that side IS picking up the digital optical output, so I know that it is working, just not with the Mac OS.
If you guys can help, I'd be greatful.
Thanks,
NetBlitzer

okay, it could be one of a few things-first, fire up Audio MIDI setup and see if that helps, secondly, there might be something stuck in the headphone jack in the on positin- maybe wiggling around in there with a plastic pen might fix it
just a thought
J.B

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