HiI am using evo upgrade on airbus series 1 in virtual cockpit if i minimize to desktop and go back in i hear hear the speaking for e.g the payload sheet nothing appears on screen its a real pain it used to work and has stopped working, i have done reinstall of FSX and both airbus series 1 and FS2crew

You said it used to work and then it stopped working.Hard to guess in that case.Maybe update your video drivers or revert back to your old video drivers.If something just stops working out of the blue, you need to figure out what you changed on your system.Best,