DVD-Audio needs DVD players capable of the DVD-Audio standard. What you can do and will work a 100% is to make a "fake DVD-Audio". This can be done by creating a slide show and adding 1 track of music to each slide. Also you could try using audio dvd creater (shareware) which ou can get here:
http://www.audio-dvd-creator.com/ . This software will produce DVD-Video discs with the audio tracks you choose. I think Ulead and Roxio have similar functions in some of their products.