Dvr-112_fw121eu2 problem

I got 112BK and flashed with DVR-112_FW121EU2.

The nero says that I can burn MCC004 up to 8x.
I opened the FW with MCSE and … see the screenshot. How to fix this?

change the blank one, set the EXT to say 008 and save, then you should see the correct speed in nero