Asus 4012a Burns At X16 Instead X40



The ASUS 4012A (40x12x48) does not allow me to burn certain brands of cdr
at x40 speed instead I can select only x16 speed in NERO.
I have 97m27s18f plasmon disks, on the disk itself it is printed x2-x52
I have tried to use the disks in another burner and it has no problem burning them at x40.
I have used previously Ritek disks there is no problem Nero recognises them as x40. I have updated to the latest Firmwarem have all latest drivers
and latest nero ver.

May be its a bug in the burner?

Please Help!