Default Bricked HTC Evo view 4g

Need held flashed stock gb ruu on my view phone stocked at HTC green logo with white screen tried unlocking the bootloader to flash the boot.img but bootloader won't unlock stock at yes no' when I click yes nothing seems to happen but when I click no phones reboot to HTC green logo with white screen it seem am I did something wrong cause I unmount the cache and I mount the sd partition before flashing the stock ruu.

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