Stereoscopic Vizard Question

[mikestatic]

We recently installed a GeForce FX 5500 AGP 8x Dual Display card (w/ 2 VGA outputs) that we use to power our V8 headset in stereoscopic mode. The card seemed to work very well for our purposes until we noticed that only the left display was rendering the avatars in our program. The right display rendered everything else perfectly, it simply does not show the avatars in the program (e.g., close your right eye the avatars are there, close your left eye and they disappear). Both displays are set to the same specifications (as far as I can tell). Does anyone have any insights into what might be causing this?