Permissions denied when enabling DMA

[Wayne Gemmell <wayneg@ananzi.co.za>]

Hi, I'm running the bf24 kernel and trying to enable DMA on my hard drive.
My first question is, is DMA already activated?

running hdparm /dev/hdc yields
	 using_dma    =  0 (off)
while running hdparm -i /dev/hdc yields
	DMA modes: mdma0 mdma1 mdma2 udma0 udma1 udma2
and hdparm -I /dev/hdc outputs
	DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
             Cycle time: min=120ns recommended=120ns
Could somebody please help me make sence of these readings?

Now when I run hdparm -d1 /dev/hdc I get 
	
	 Wuler:/var/www/Digi-CRAUDphp/Venue# hdparm -d1 /dev/hdc
		/dev/hdc:
 		setting using_dma to 1 (on)
 		HDIO_SET_DMA failed: Operation not permitted
 		using_dma    =  0 (off)

Has anybody got any ideas?

Regards
Wayne Gemmell