Pioneer 107d

hi can any body help ive just got a pioneer 107d as well as some 8 speed dvd-rs which are ARITA but the only problem is they will only burn at 4 speed as any body got any ideas the firmware im runing is 1.18 cheers

I have the same writer and it will only burn 8x with certain media. I wish I had just stuck with a 4x writer because you lose quality with over 4x.