OK, here's what you can try, JENI. Download the zip file which Burn2Death linked to, unzip it, and put its contents on a blank bootable floppy. Make sure that there are no autoexec.bat or config.sys files on the floppy.
Then, boot off of the floppy and type, "MTKFLASH "x" W /B 8520b.bin". Replace X with 1 if the drive is primary master, 2 if the drive is primary slave, 3 if the drive is secondary master, and 4 if drive is secondary slave. BTW, I got the info on using MTKFlash from OC-Freak's Firmware collection and MTKFlash guide at CDFreaks
Hopefully, this should get the drive working again.