HDD Help

I just need someone to help me. I have a Asus P8Z77-V pro mobo and a WD caviar Green 2tb hard drive and a Samsung 840 SSD. i have windows loaded on the SSD and the HDD is not recognized. but on the bios boot properties, the device is there, but i cannot select it. so i switched the sata ports from RAID and IDE ect. now it has the HDD as the first boot priority and if i just let the computer boot up, it will crash and load windows recovery. i have to go into the bios and manually select the SSD to get the system to boot.