The primary reason that I downloaded dbPower is to convert (.aa) files to WMA for use on my Toshiba Gigabeat. However, I can not get it to work. The following error appears:

The CODEC required to decompress 'C:\Documents and Settings\bsohn\My Documents\Audible\WallStreetJournalWeekendJournal1 2-22-2006_acelp16_brucesohn.aa' could not be opened.
DirectShow filter for '.aa' not installed, or Audio File Corrupt.

I downloaded Audio Manager today (for the first time on this computer). I have DirectX9 installed. I downloaded the codec (DirectShow) from Codec Central and have installed it (although I do notice that it is not listed in DMC Configuration). I have added the ".aa" extension to the DSExt.txt file. I have Windows Media Player 11 on my system. I have never listened to the file that I'm trying to convert.

Thanks for any assistance.