Okay, this has probably been discussed before, but I can't understand why the DM4 software says the dive computer is not connected, when it is and the dive computer says it is in data transfer mode. The frustrating thing is that sometimes it connects on the first try and sometimes it takes several tries or sometimes it just won't at all. Today I connected my back-up to the software and it downloaded all of the dives. Tried to reconnect to look at some data on the computer and it was a no-go. What's happening?