I have 3 subdomains websites. Those are subdomain1.mydomain.com, subdomain2.mydomain.com, subdomain3.mydomain.com. I have point these to the external IP address. bind is ok, dig is onerror, Apache2 reload ok

1.) If I set the following, I can only see the first one alphabetically.

NameVirtualHost *:80    
<VirtualHost *:80>    
   ServerName subdomain1.mydomain.com
...    
<VirtualHost *:80>    
   ServerName subdomain2.mydomain.com
...

2.) If I set the following, I get file not found. Apache2 reload ok.

NameVirtualHost mydomain.com:80    
<VirtualHost mydomain.com:80>    
   ServerName subdomain1.mydomain.com
...
<VirtualHost mydomain.com:80>    
   ServerName subdomain2.mydomain.com

Please Help! What else should I do.