unable to play audible files

What is the best way to play audible files (from audible.com) on a sansa express. I have downloaded the book and copies it to sansa but even then I am unable to play it. do I need to convert it into a mp3 and how do I do that ? Any help would be really appreciated.

You’ll need to use the Audible Manager to do the transfer, and you need to make sure the Express shows up as a Portable Device.

You also need to make sure it’s showing up as a Portable Device.  Also, formatting is a good idea (you can use both the internal format and the one built into Windows Media Player, both help.)