I have downloaded and installed everything you smart guys have published lately, up through Le Grand Cirque and its two patches, thru 3.7.2. All seems to have gone well, I thought, until I tried playing the newly installed Marine campaign last night. Now it seems as though something is messed up someplace. I have ended up with no engine or gun sounds, in or outside the cockpit. It seems as though sometime when I move my mouse around the screen during a mission, in one position or another (?) in relation to the aircraft, I get some engine noise then but then when the aircraft turns, it is lost again. Voice stuff (pilots talking, etc) seems to be fine. What do you reckon I have done wrong this time? I have no qualms about going back to some previous patch and starting from there, but I don't remember for sure how you do that. What do you smart fellers advise? I haven't added any strange mod to my game. That stuff scares me. Any advice or help you can give one who is pretty old (77 last week) and not smart, as always, is much appreciated. By the way, just for shits and giggles, I tried another campaign last evening also, to make sure it wasn't just the Marine one, and it had the same issue. Thank you for your patience.