Not sure what you is the matter.
The only things I can think of ...
1. It is scrapebox. Restart everything and go through all of your setting and try again.
2. It is your private proxies, try using free ones.
3. It is your domain. Try posting with a different website.
Those are the only things that i can think of, and it sounds like you have covered all of that. Maybe try starting over from scratch.
Harvest public proxies, harvest a small blog list, blog analyze them, write some good comments, use new website(does not have to be yours), and try again.