When I start importing video into iMovie '06 from my DV camcorder, the sound changes to one channel only (I know the audio on the tape is stereo), and stays that way perpetually, even after I quit iMovie, restart, zap the PRAM, and even do an "Archive and Install". I had to do an "Erase and Install" for it to return to two channels. But the second I start importing video in iMovie, it's back to one channel. I checked the Sound control panel and Audio MIDI Setup, and everything looks fine. Help please!