Just watched 'The Thing' on Blu-Ray. Fab, of course. However, I enabled the 'U-Control' feature, which means evey now and then a picture-in-picture pops up which has the director or producer or whoever explaining something about that particular part of the film. However, whilst the picture popped up it had no sound. I had enabled the sound for picture in picture on the blu-ray menu before starting. Any ideas why no sound? My kit is a Panasonic TX-L37G10 and Panasonic SC-BT200 home cinema system. Thanks.