I have one of the dual band Airport Extreme's with Time Machine. I have all my movies and music backed up to it. I just got a new movie and now I can't copy it to the disk. I can copy smaller files like songs and documents but nothing bigger. I've tried it via both WiFi and wired, so its not my WiFi. I keep getting this message saying that I'm not connected to the network and to try again, I can tell that I am though because I can open movies on the drive and play them on my computer. I tried turning on and off (and my computer too). What else can I do?