A long time ago there was a version of the OPML Editor that had a feature called Map-A-Domain. If you used that feature to create a directory hosted on my server using your own domain name, you need to do a little maintenence.
Instead of mapping your custom domain to 67.18.151.44, now you have to map it to 75.101.165.156.
The old server will be retired soon, probably in just a few weeks. But you can make the change right now.