This is actually because you have set a password for your blog post. I believe it was not done in purpose and your browser might have auto-filled it. I have turned off the password protection feature in EasyBlog so you will not see these messages again
Should you want to re-enable this feature, go to Settings > General > General and turn on password protection.
Maybe you have miss-understood what Mark have said above. He have disabled it for you and it now can be access without any authentications anymore. As i tried to access your given url above, it seems that i'm not required to enter any authentications or password as you can see here http://screencast.com/t/qvbwIeSwu. Maybe you can give a check first and see how it goes.