Asus 4824A & TDK 48.24.48D do not flash

I have: Asus 4824A & TDK 48.24.48D (MTK chipset)
do not flash (unknow flash type), but read is ok
I used Mtkflash 1.55, 1.68 & MtkWinFlash
Can help me?

So you read out the firmware from your TDK CDRW4800D? Can you send me the backup? There is no mtkflash 1.68, unless I am mistaken. Other people are unable to flash their Asus drives too. This thread should be moved to the firmware forum since it has nothing to do with Lite-ON drives.