What to do of this DMA??

I get constant prompt by NERO that your drive is not in DMA mode, which slows down copying and writing speeds for my drive.

Is there anyway I can enable it? Nero's dma manager is not working. After every restart, It still is disabled.

Please help me, to speedup my drive's copying speeds.

My system : P4, XP sp2, 512 RAM, Intel original board, And LG dvd writer.

Thanks in advance!!