I'm trying to download the logs from my ArduCopter with APM1 and ArduCopter 2.0.55. I'm following the directions in http://code.google.com/p/arducopter/wiki/AC2_Logs , but the log dialog in Mission Planner shows no logs. If I enter "logs" in CLI, nothing happens. I don't even get into the logs menu. What's wrong?