I mapped the sub-domain to my WordPress URL (http://vientreenalquiler.wordpress.com), and it worked for a while. Then suddenly all links to either the subdomain or the original WordPress URL result in a Server Not Found error.
The site at the main domain is still up, and the sub-domain was working correctly for about 24 hours, so I assume the problem is not with my domain hosting service. (Although I suppose their CNAME record could fail, but seems unlikely).
Because neither the subdomain URL or the WordPress URL are working, it makes me think the problem is with the WordPress server. How can I check this? I can still reach my account dashboard, but I can't even preview any new posts.
The blog I need help with is blog.sensiblesurrogacy.com.