PPT will not track more than one LED

[eponymous]

Hello,

I am a graduate student trying to make a project work with PPT. Our setup has two cameras and the software is version 1.23. When the software is set to use one light, everything works great - the num_lights light turns green, and the tracking info is returned to clients. However, when I change num_lights to two, it doesn't work. The num_lights light stays red and no tracking information is returned about the second light.

In addition, I cannot increase the number of lights past two - though it looks as though I should be able to track four. The people here don't seem to know how to fix it, so I am throwing myself on the mercy of the message board. Do I need a software upgrade? Thanks!