Samsung H542A Won't Burn Faster than 4x



I recently purchased the Samsung H542A DVD burner and I’m having difficulty burning any faster than 4x. I’ve updated the firmware to the latest version. S05. I’m running winxp pro sp2, p4 2.54g, 512 RDRAM. I’m using Nero 6, and alcohol 120% still only 4x. also used nero infotool and it says my max write speed is 4x. i’m using memorex DVD-R 8x media. any help would be greatly appreciate, i’m at my wits end! :eek: :confused: thanks!