Hi all, its all working now, I think I made the mistake of unplugging the rephone from the computer without ejecting it as a drive. I erased my origin sound file, which was a complete tune, which although installed in the file system on the rephone board, would not play, even manually. I installed two different MP3 files and have one for text and one for ring tone notifications, and this all works fine now. I can only think unplugging the rephone without ejecting it on the computer caused corruption as sometimes happens on USB flash drives, fortunately its ok now.