Attention audio/video guru's ? re. dvd-audio

It seems that my reasonably new and reasonably expensive dvd player has decided to only pickup the dvd-a layer when it has the option of both dvd-a and dvd-v I know when I first got it I could access both thru the on-screen menu but know it defaults to the dvd-a and won't let me get to the other layer,it is not the end of the world but I like the dts surround mode sometimes and I can't seem to get there anymore it just forces me to use the pcm mode I just know I am not alone and one of you can point me in the right direction