Error 1785 - NO Hard drives detected on a new ProLian ML310e Gen8 v2

I just bought a brand new ML310e Server and it's the first time I work on a server like that so you may forgive my lack of knowledge.
After it powers on, the following error appears:
*HP Dynamic Smart Array B120i RAID Controller (v3.54,0 0MB) 0 Logican Volume
*1785-Drive Array Not Configured
*NO Drives Detected.
I pressed F5 and checked the ACU, and i get error code 1: no Drives detected.
I restarted, pressed F9 to enter the BIOS setup 
System Options-->SATA Controller Options-->Enable Dynamic HP Array B120i RAID Support
was already enabled.
My Server comes stock with 2 x 1TB : MB1000GDUNU 
I also have 2 brand new WD2003FZEX that I would like to add later on, after resolving the 1785 error.