moh3en, download s1fwx from here
http://www.mympxplayer.com/dload.php...le&file_id=136
then connect your player to your PC and run the extract.bat in the s1fwx folder, this will create a file called dump.bin. Then run the repair.bat which will check and repair the dump file. The resulting dump.bin file is your firmware backup.
It would be great if you could then upload it the site along with some info on your players specifications and maybe a picture. That way you will always be able to download a copy if you need to and it may help others who run into problems.
Thanks again