Hello Matt and welcome back to the Cow Audio Forum.
If I were you, I'd try this question in the Digi Users Conference on their site. It could be a basic lack of compatibility between PTLE (Pro Tools LE) and the specific computer. Digi has documentation about which computers they have tested. Not all configs work well with PTLE.
If you have Countryman lavs with XLR connectors, they require Phantom Power. Your computer input does not provide that. The easiest way to do what you want to do is buy a mixer. Go from mic to mixer to camera. 1/8" Camcorder inputs vary widely. There's no way to know form what you present to know what your camcorder input wants to see as an input. More details, please.
Regards,
Ty Ford
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