Correct power up settings in BIOS for a Dell Optiplex 7010

My company is using a Dell Optiplex 7010 on one of our products. I would like to have the ability that when/if power is lost or restored the PC will power up without pushing the power button. I have gone into BIOS and selected the "Setting" Restore Last Power State but I stll have to push the power button. The BIOS version is A16.

Thanks in Advance

Ripcord2