Help - harddisk sas not detected when install windows 2008 r2

Hi there,

Need help please.
We just bought e320e g8, and add 2 harddisk 450gb sas.
I've configured raid 1 (i found the system use p222 as smart raid).

When install windows 2008 r2 enterprise, the windows can't detect the hard disk.

I'm pretty sure already set:
- boot sequence order: cd rom, hdd
- hdd boot controller: (1) P222 raid, (2) p120 raid
On f9 menu.

And on raid menu (by pressing f5), i did:
- configure raid 1.

Kindly please help how to make the harddisk detected by windows installation. Thanks in advance