Mr. Skeen has this to say:
"I'm only guessing since I don't know what program you're using or how experienced you are with audio editing (so I apologize if this is way beneath your level of knowledge!), but the first thing to do is to convert those files to .wav format. Most audio editing software is designed to work with raw .wav files and convert to some other format later."
What problem is your edior having specifically? If I know, I can ask Mr. Skeen for you. Don't worry about being too technical, when I relay it to him he'll understand it even if I don't. You can PM me if you want.