recovery button not working

[vinci]

Hi,
I'm trying to root my phone and install twrp and root my phone. I've already unlocked the bootloader and I've been trying to follow the instructions from the site https://htc-one.gadgethacks.com/how-to/unlock-bootloader-root-your-htc-one-m8-0154444/
I've downloaded several version of twrp for m8 (one of which from here http://www.devfiles.co/download/AjTazaDj/twrp-3.0.0-0-m8.img)
So after I run fastboot flash recovery twrp--3.0.0-0-m8.img, the recovery button doesn't work. I press it and fastboot resets instantly.
When I go back to HBOOT (switch from FASTBOOT), the phone does a very fast checkup and it seems to say that it hasn't found an image: "No image or wrong image".
If I reset the phone, it works fine. Any ideas where I should go from here?

 

[vinci]

I'm not sure what I did, but I tried a different twrp image and it's worked eventually. I'm now trying to install a custom OS

 

[Hadron]

Yes, the original problem was a bad/broken recovery image, so flashing a different one was the right fix.