Can't Reduce Vocals with wav file using 3.05

[music_cutr]

I read previous topics about this and saw that this feature might not be working. I get the same behavior mentioned - nothing happens (versus getting a pop-up window). I also read that it might be required to use wav format rather than mp3. I opened the file directly form the cd, selected all, selected reduce vocals, and saved to a new file wav format. The new version sounds just like the original. Is there something I am doing incorrectly or does this still not work? If it still doesn't work, is there any target timeframe for it working? Thank you.