I have had the parking brake set since flight inception. I clicked the blue "ground power available" light 5 minutes ago...and have waited per the RTFM...no ground power is available. What am I doing wrong...I can't get Ground Power? Vic

Here is a maybe or two: sometimes the memory doesn't clear and load, sometimes a gauge doesn't load. Close FS, wait aminute, and open again. And I always load the TM with the engines shut down, let the panels load, then immediately turn off the baattery, starting cold and dark. After the battery switch is on, I request ground power. It seems to me tho that it takes more than 30 seconds, but I really don't know. And It seems to me that sometimes FS just decides to have a glitch, for no known reason.Maybe somebody else has a better solution.lr.