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You need to grab your Private Posting Key and sign in on our login page. If you use the wrong key it will not register your account.

Thanks for helping, I am already a register member. My name is not in the casters list.
https://shadowbot.us/shadowbot/casters.php

You have to use your private posting key to register, In wallet on steemit you will see a posting key that starts with "STM" this is the PUBLIC posting key. You will see a button to the right that says "Show Private Key". Click that and you will see your Private Posting Key. That is the key you need to use to join.