why isnt my internal hard drive not being detected in disk utility

I see nothing there
also, i cant change anything from the bios menu when i go into system menu by pressing f10 at startup screen. Ive been told that changing your drive from AHCI to Compatibility might result in your drive showing up in disk utility.
Could some one help me how to do it!
Please!
Thanks
I have an HP Pavillion dv6607nr
AMD Athlon(tm) 64 X2 Dual-Core Processor TK-53
Motherboard Manufacturer - Quanta, Model - 30CF
Chipset and Southbridge - NVIDIA nForce 560
BIOS: Brand - HP, Version - F.07, Date - 08/09/2007
Memory: 1024 MB DDR2
GPU - Standard VGA Graphics Adapter A1
More info regarding configuration is attached as text file (I used CPU-Z)