Indeed it's strange, it seems that this is not the servers that are involved.
Your servers have already functioned properly, or is a new configuration for you?
This happens only locally, or external users also are face to the same problem?
Have you tried with different browsers?
What says the self-test of HFS?
Give an Example of your URL to access your server ... even false, but which follows the syntax used and the location of the @ (s)