Main Shared IP displays 'Index of /"


The email received from KH for my new CA VPS says that is the IP to use for Shared accounts. So does WHM. But entering that into my browser displays "Index of /" rather than what I'm used to seeing which is:

Great Success !
Apache is working on your cPanel® and WHM™ Server

Which DOES appear for all the other IPs I was assigned.

Any ideas why?