I recently bought 2 cardioid mics for my dr-44wl. I can't find anythimg in the manual about setting up external mics, nor can I find anything on the internet. When I plug them in ( make and model: sennheiser e838ii-s), I get nothing. Is this a mic issue? Does the tascam not support cardioid mics? Is this a settings issue withing the tascam software?