transfer .koz files to mp3 or wma

[krug98]

I'm trying to pull the .koz files off of my motorola ic902 from Sprint and change them to mp3 or wma files so that I can make a CD out of them that will play in a CD player. I have changed the format to wma and mov files but for some reason, when I playback the file on my computer I have a lot of audio problems (i.e. lots of strange bleep and scratching noises, play speed seems to change, etc.) Is there anything I can do to get a clean wma or mp3 file out of a koz file?