Problem installing new hard disk

[nanop1i]

hi, friends my system config is:

Intel EM64T 3 ghz processor, Asrock 945gl dual motherboard having 6 sata ports, 1 gb ddr ram, 80 GB, i am running windows XP.

My problem is, recently i have bought a 160 GB sata seagate hard disk but my sysmtem is not reporting that hard disk. I have tried every possible way to connect it but of no use.
Now when i connect that same hard disk to my friends system( quadra core 2.4 ghz, Gigabyte 946 s sreies mb, 3 gb ram) it is getting detected without any problem... can you plz help me out.
thanks in advance..

[techtronic]

Check whether RAID is enabled in your Motherboard BIOS.
If yes disable it and then try connecting our Hard Drive

[topgear]

Did ur mobo bios detected the new HDD.
Have enabled all sata ports in bios.
Do check those & reply.

[codename_romeo]

Check in ur BIOS whether that new HDD is being detected or not.