Forum Linux.debian/ubuntu DMA Problem on HARD-DISK

Hello all, I just setup a debian woody unstable on my ShuttleX :

configuration : Debian GNU-Linux 2.6.11.7 woody/unstable on i686 AMD ATHLON 1800+

The Shuttle motherboard type : SN41G2 - NVIDIA nForce2-GT chipset FN41 - 1xDDR400-512Mb - Integrated GeForce4 MX core - channel sound (MCP-T
and AC'97 codec Realtek ALC650)- PCI typical of XPC.

When I'm trying to use hdparm on the /dev/hda here is a problem :

kain:/home/frederic# hdparm -c1 -d1 /dev/hda

/dev/hda:
setting 32-bit IO_support flag to 1
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
IO_support = 1 (32-bit)
using_dma = 0 (off)

the kernel .config options :

lqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk x
x x <*> ATA/ATAPI/MFM/RLL support x x
x x <*> Enhanced IDE/MFM/RLL disk/cdrom/tape/floppy support x x
x x --- Please see Documentation/ide.txt for help/info on IDE drives x x
x x [ ] Support for SATA (deprecated; conflicts with libata SATA driver) x x
x x [ ] Use old disk-only driver on primary interface x x
x x <*> Include IDE/ATA-2 DISK support x x
x x [*] Use multi-mode by default x x
x x <*> Include IDE/ATAPI CDROM support x x
x x < > Include IDE/ATAPI TAPE support (EXPERIMENTAL) x x
x x <*> Include IDE/ATAPI FLOPPY support x x
x x <*> SCSI emulation support x x
x x [ ] IDE Taskfile Access x x
x x --- IDE chipset support/bugfixes x x
x x <*> generic/default IDE chipset support x x
x x [ ] CMD640 chipset bugfix/support x x
x x [ ] PNP EIDE support x x
x x [*] PCI IDE chipset support x x
x x [*] Sharing PCI IDE interrupts support x x
x x [ ] Boot off-board chipsets first support x x
x x <*> Generic PCI IDE Chipset Support x x
x x < > OPTi 82C621 chipset enhanced support (EXPERIMENTAL) x x
x x < > RZ1000 chipset bugfix/support x x
x x [*] Generic PCI bus-master DMA support x x
x x [*] Force enable legacy 2.0.X HOSTS to use DMA x x
x x [*] Use PCI DMA by default when available x x
x x [ ] Enable DMA only for disks x x
x x < > AEC62XX chipset support x x
x x < > ALI M15x3 chipset support x x
x x < > AMD and nVidia IDE support x x
x x < > ATI IXP chipset IDE support x x
x x < > CMD64{3|6|8|9} chipset support x x
x x < > Compaq Triflex IDE support x x
x x < > CY82C693 chipset support x x
x x < > Cyrix CS5510/20 MediaGX chipset support (VERY EXPERIMENTAL) x x
x x < > Cyrix/National Semiconductor CS5530 MediaGX chipset support x x
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i think i have setted up it correctly. i need help . thx before =)