G900h root problem

Hello team i have been trying to root g900h, i have downloaded, cf auto root file from "https://download.chainfire.eu/402/CF-Root/CF-Auto-Root/CF-Auto-Root-k3g-k3gxx-smg900h.zip" but after flashing, the phone only hang on logo, i cant go to recovery, but if i flash firmware phone will be okay, but when i flash cf-auto root ,phone hangs again, please help