my virtual host not working !!!

I installed new fresh virtualmin on centos 7.3 x64.

but not working any virtual host created !!!

I create a subdomain and define A record to server ip, and on virtualmin server create new virtual host for subdomain.

I running re-check configuration from virtualmin and not errors.

my config in "system settings "=> "virtualmin configuraton" => "network settings" :

Default virtual server IPv4 address : From network interface

Default IP address for DNS records : Automatically detect external address

and remove all virtual host then create new. but in browser and when enter URL, stay on waiting status and not connect to virtualhost for loading data.

Thank you for your guide.