then i now remove the hard disk and use another board to load the hard disk then the hard disk work perfectly with the system..PLEASE REPLYYYYYYY...
Since it worked with another mother board this can indicate a hardware problem with the other mother board. If those boards are identical clones, then it's a bit strange, because a faulty mother wouldn't normally even boot!! Unless I'm missing some thing here.
I'd try to first blow the mother board with a blower to get rid of any dust.
Another thing, did you surface scan the hard drive, It could be a bad cluster. To scan it, boot from the Windows CD, when the options come, press "C" to go to the Recovery Console. When you get the command prompt, type: