APU starting and staying on issue has been resolved. It was due to an issue with FSUIPC. I now have the sounds in the VC all the time, but sometimes they are missing from the 2d. I did install the codecs as recommended, copied the MSVCR71.dll file to both C: and Main FSX folder (was already in System32) and Changed the sound file as suggested. I guess this is just a bug that I will have to live with until CS comes out with an update if they choose to fix it. At least I can do everything from the VC and most things from the 2d.