Has anyone experienced an ATC lock-up when flying long flights?From time to time, when I try to open the ATC window, it will flash briefly, then disappear completely, and there is no way to open it until the conclusion of the flight. It has usually happened after long periods of ATC inactivity - on long flights I don't contact every CENTER; I merely tune them in and wait until late in the flight to begin contacting them again. Most of the time it works fine.Also wonder if it has to do with crossing the intl dateline. Possible correlation there, too.Any ideas? Thanks for any input.

Steve,ATC dies just flying from Oz to Kiwiland. Probably where there is no AI or ATC kills it.