I have a question regarding my Sony DVD player- model NS725P. On many of my DVD's, in the middle of the movie (usually during scene changes) the movie will freeze up for a second or two. I checked the discs and saw no scratches (some are brand new). Does anyone have any suggestions on what the problem could be or how to fix it. This problem occurs using the optical outs or the RCA outs. Is it some problem with the player reading the disc layers? Thanks for the help.