I use a Roland M-480 at church. For 2 weeks in a row now, when I remove the WNA 1100 from the USB port (I'm using the remote iPad app), and then insert a Kingston Data Traveler to record the sermon, I get a 2-3 second high-pitched squeal, and then the board freezes and dies. Everything is lit up, but none of the controls work and there is no sound coming from any of the channels. The only fix is to reboot the board. I was wondering if anyone else has experienced the same problem. I'm assuming it's either a bug in the app or a bug in the firmware update I had to do in order to be able to use the iPad app. Thanks in advance for any help or advice! God Bless!