I haven't flown the F406 in a while, and I've been testing it again since the last update from the previous days. Once the engines are started and everything else is, after carefully following the checklist (including the outside walk before start), everything works, except the instrument that displays the aircraft's speed, which stays at zero. I don't know if I'm forgetting something or if it's a bug. Note: I did remove the socks from the 2 pitot tubes. Is anyone else having this problem, too? Where did you find out about this problem?