Chimera won't boot from USB drive

[Kampayne]

I'm building my first hackintosh. Here's the specs:
Gigabyte GA-Z77X-UD5H
EVGA GeForce GTX 650 TI Boost
Intel i7 3770K


I've created a bootable USB drive using Unibeast and have plugged it into my hackintosh. When the computer boots on, I hit F12 to get into the boot menu. I then select my USB drive and it brings me to the Chimera screen showing my USB drive created by Unibeast. When I hit enter, it attempts to run from the flash drive, I see the apple logo for a quarter second and then the computer restarts and brings me back to the Chimera screen.

I've tried the boot flag "GraphicsEnabler=No" but that didn't help. I've set my BIOS settings (SATA mode selection to AHCI, Marvel ATA Controller Configuration all set to AHCI).

Any one have an idea of what I'm doing wrong?

Thanks!!!

 

[rapproducer714]

If you have a DEP (Data Execution Prevention) setting in your BIOS, enable it and it might run. Mine was doing the EXACT same thing until Rehab Man told me to do that.