Griffin iTalk

I've been experimenting with the Griffin iTalk for the iPod. It's a neat gadget that aloows your iPod to turn into a voice recorder. So far the experiment has mixed results. The bult in microphone condenser works fine, the speakers is a bit crappy but who cares. What I really want to do it to use the microphone pass through feature to place a microphone on my lapel and to record my voice while I talk. Unfortunately, after trying out two iTalk units, I can't get it to work. All I can record is dead air with an attached external microphone. It's as if the iPod and the ITalk can't recognize that it's a microphone plugged in instead of a set of headphones. Darnit! I'm try to get help on the iPod Lounge forum. More to follow on this as it becomes available.