Ok, so I bought a senneiser 300 and plugged it in, the mic icon on the gh2 came on letting me know the the camera was seeing the mic or whatever, but the sound meter wasn't showing that i was getting any sound. Pissed off, i send the mic back saying it was broken. Now I bought the senneiser 400 and same thing.... can't get the camera to show sound being recorded, but it works fine if i unplug the mic. Help...