[URGENT] Help for setting up domain under webmin/virtualmin

Hello, i've finally come into posting these after several weeks of troubleshooting on my new linux vps with both webmin and virtualmin 3.94.gpl installed.

I am a newb in linux and of course very new to webmin/virtualmin.

All i want is to add a domain into my server and start publishing simple webpages.

Heres what ive done,

I have pointed my domain from namecheap.com to the dedicated nameservers (NS1.mydomain.com/NS2.mydomain.com) with a single ip given by vps host. 198.12.12.123

Now, i setup and install webmin/virtualmin and landed onto default apache/centos page through http://198.12.12.123/ or http://NS1.mydomain.com or http://NS2.mydomain.com

Have also successfully logged into the virtualmin page @ https://198.12.12.123:10000/

OK. Everything good so far has been done.

I carried on to add a virtual server, from reviewing guides i could find to add my domain name "mydomain.com" into the "Create new virtual server"...

All created successfully and able to view my domain http://mydomain.com/

Alright, My main problem here is that i am only able to view .html but not .php! Don't understand why everytime i tried to locate a simple .php extension file like "http://mydomain.com/index.php" it gives me a

503: Service Temporarily UnavailableThe server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later. Error after loading for a couple of minutes.

However, http://mydomain.com/index.html works completely fine.

Some info on the servers are as follows:

Operating system CentOS Linux 6.3 Webmin version 1.590 Virtualmin version 3.94.gpl GPL Theme version 8.5 Time on server 15/Sep/2012 15:01 , Up 0 hours, 56 minutes Kernel and CPU Linux 2.6.32-042stab057.1 on x86_64 CPU load averages 0.00 (1 min) 0.02 (5 mins) 0.02 (15 mins)

Please help!