Continued Problems With WPMU Installation and Subdomains

I have been having trouble with this site after a hack and have totally deleted site and rebuilt it. I am still having trouble getting the multi user, new blogs to work with subdomains and don't know what I am doing wrong.

I have created some new test sites and I notice that the subfolders are not being created in the blogs.dir folder, it's permissions are set to 755 and when the new site address is loaded all I am seeing is the "Great Success !
Apache is working on your cPanel® and WHM™ Server" defaults page.

Please let me know if you have any suggestions or know where I can start by troubleshooting this issue.

Thanks in advance,

Nick Simpson