I need some help from anyone who uses iRivers. I've got an Audio-Technica wired lavalier mic and an Audio-Technica stereo mic. My iRiver records great with the stereo mic. I can monitor the signal and it records just fine. However, when I try to record with the mono lavalier mic it doesn't record. Whats really strange is that I can monitor the signal with the lavalier plugged in but nothing shows up in the recorded file. Maybe the iRiver doesn't like a mono mic connector?? Any advice?