My first post: I have FSUIPC4 4.939 (registered) running in P3D 2.5; Saitek yoke, throttle, rudder, and trim fully controlled by FSUIPC (and thank you for that!). My problem exists with or without TRrackIr 5 or ASN add on programs running. When I start P3D for the first time after a PC boot everything works perfectly until I adjust the trim control; once the trim is used I lose all control inputs and FSUIPC not only quits working but is frozen to the point that the program cannot even be modified, nothing can be selected. However, if I exit P3D and restart, everything works perfectly again including the trim. The only difference in the FSUIPC4.log is the following entry in the first run: 1900890 ***** HID USB device reconnected: re-initializing FSUIPC connections The line is gone from the log on the next run. I have changed USB ports and tried resetting the trim settings (after the first run) and the problem persists. I look forward to any suggestions.