incorrect settings
1) Look into your /etc/hosts and /etc/resolv.conf first make sure they have correct info
Short-Host-Name is the return of &shorthostname& command when you enter it through SSH shell access
/etc/hosts :
# Do not remove the following line, or various programs
# That requires network functionality will fail.
127.0.0.1 localhost.localdomain localhost
Server-IP domain.com Short-Host-Name
/etc/resolv.conf :
domain domain.com
search domain.com
nameserver IP-of-ns1.domain.com
nameserver IP-of-ns2.domain.com
# you can have additional nameservers here
2) In WHM -& server Setup -& Initial Name Server
3) Restart the Apache
4) Above procedure should solve the problem but If you still see the failed Icon , Graceful Reboot (Wait for necessary time until all of your services be up and running)