Exclamation Chainfire 3D stuck on reboot HELP PLEASE!!!

So I didnt read the Chainfire 3D text and installed it on my Samsung Galaxy S5 (AT&T) and now im stuck on reboot. I've tried factory reset but it still didnt work. When I tried flashing with odin it keeps saying "FAIL". Help as soon as possible!! (Sorry if I posted this in the wrong forums.. I'm new to XDA)