portable hard drive

I have a Segate 40 GB Momentus ATA hard drive. The drive is connected to the USB port, but the computer does not recognise the drive. Please send your suggestions if anyone experienced the same problem.

you mean you dont see it in explorer window?
have you tried computer management
right click my computer manage go to disk management see if it is there unformatted
have you loaded the usb drivers
check your device under hadrware see if you have yellow ?

Yes. the usb drivers are loaded
I checked the portable drive under hardware, and it is marked yellow.

did any drivers come with the hard drive?? if so install them first

no driver came with the hard drive.

yellow means they(drivers) are not loaded right
get the manual for MB look to manif. website for usb drivers for same
you may need to upgrade your bios
the drive itself does not need drivers
if you opened the case it's just a ide or sata drive with adapter
if you have other usb device does it work in that port??