I need some help, and I'll have a hard time explaining this.

I only have LF, LR and Center speakers.

My DVD audio is hooked up to my 950 via the Optical 2 input. When I watch a movie or listen to a CD on my DVD, I only get sound through my Center speaker. The only sound from the front speakers are an occasional distorted signal.

To listen to stereo I need to hit the bypass button, but then I'll lose the voices in the movies.

Everything worked fine but I have a visitor to my house and I think they screwed with buttons and messed smething up - probably playing with my Exbox (which I now have completely disconnected).

I've tried resetting the system to no avail. Any ideas?
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Outlaw 950 / 770
OPPO OPDV971H
Sony PS 3
Sharp Aquos - LC46E77UN
DirecTV - HD DVR
Mains - Paradigm Studio 80's
Surround - Paradigm ADP-470v-3's
Sub - Paradigm Seismic 12
Center - Paradigm CC-470
Outdoor - Paradigm Style 470's