Well, without knowing your domain name, it's hard for people to tell you more than what the error message posted already says: From some locations, the connection to validate that you control the domain name is failing with a "connection refused" error. The "secondary validation" part of the message means that it could connect from a primary datacenter.
The most common case is a firewall that's set up to block from some parts of the world but not others. This FAQ may help explain what's going on there:
If you're willing to post your domain name into online tools, even though you're not willing to post it here, then you may want to look at the tools listed in that post to try connecting to your site from various places around the world.