[cgagan]

Presumably, you lack something, perhaps the soundmod. Check for it in your game's directory. If you have it, use the windows explorer, go to your game's MODs folder (I gather you have one), find the C47 skytrain folder and disable it by placing an - before it. I suppose you used the auto installer. Next time, save the mod in your desktop, extract the contents there (using winrar or relevant), then manually install the mod, putiing relevant lines in your air.ini, planes.ru, weapons.ru etc. This looks a bit difficult (it isn't) but it gives you full control of the installation process