I have an old amp the Pioneer VSA E06 THX Dolby Digital amp and have just got a new Toshiba HD E1 dvd player which is connected via optical. Problem I am having is the player decodes DD from standard dvds but when I play HD dvds it won't decode ? Is it because of Dolby Digital Plus that HD dvd uses ? My mate has a newer Pioneer amp with the same player that decodes with no problem. So what is wrong with mine ?