I seem to recall that Dorken will not install with our developer's certificate in-place.
Since the poster has (or had) Dorken installed, then they don't have our device jailbreak certificate in-place.
Start by installing our Jailbreak for your Kindle model.
If you **did** install our Jailbreak **before** you did the update, follow the instructions in the Jailbreak first post about re-installing those things you need to re-install.
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