mp3NOTmp4 , at this moment the S1fwx only supports upto v9.0.43, so the firmware you extracted from your player has missing files, which is un-usable.
What i would suggest is that you go to the S1mp3 forum here
http://www.s1mp3.org/en/downloads_fw.php
As they have more monochromatic player firmwares. Then try all the v9.0.xx series firmwares until you get your player working again.