I had the EXACT same problem, and with no coding skills I used problem solving, now I'm not sure what fixed it, but I'm sure someone here will point it out.
Look through your installation text file and remember all those files you moved and put "-disabled" well, one of which was your virtual hosts.
Code:
6. Clean Apache's conf.d directory
# mv /etc/httpd/conf.d /etc/httpd/conf.d-disabled
7. Configure BIND DNS
# mv /var/named/data /var/named/data-disabled
If you want all your old sites to work again, just rename your old files, the "-disabled" to its original name and name the new ones to something like conf.d2 and data2 respectively.
Now if you want both to work, you basically need to merge the two folders together, copy the files from one into the other, and if it asks you to replace, you either open up the file and try and add both scripts, or you choose which is more important.
Restart bind and apache, and if you have webmin or something go look up the settings to make sure they are all back to normal.
Hope this helps fix your problem, I did many things to fix mine, but im pretty sure this is what fixed it in the end.