Problems doing OTA upgrate after root - not standard problem

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http://forum.xda-developers.com – Hello, I am currently running rooted stock rom with HTC Dev unlocked bootloader with clockwork recovery. When I tried to download and install OTA it of course fails. I installed stock recovery, same thing installation always stucks at 1/3. I tried relocking bootloader, i tried un root. And I even tried to install Maximus rom (after unlocking bootloader and installing clockwork again) and I cant. Is there something that I messed up? Is it possible I am using wrong stock recovery image? (HowTos)