hi
I'm not sure if you understood Stefano info, so I'll put it another way:
your DHCP server is deliverying information about your network... and that's is part of problem.
When a PC receives an IP from your DHCP server (modem) it must be receiving the DNS server: a external one.
you can verify this by use ping. In a PC type "ping
www.meritage.com.au" and you'll see the external address show up!
You should configure the DHCP server on your modem to delivery as DNS server ans WINS server the IP address of your SME server: 10.0.0.140.
This way when a PC, IPAD or WiFi device try to solve
www.meritage.com.au the DNS server will inform the internal IP address of your server: 10.0.0.140.
When the above ping show 10.0.0.140 , you'll have no more problem.
I hope this help you.
If it does, please put SOLVED on subject... and think about to donate to SME project, even a few US$ (5 to 10) helps to keep it moving forward.
If you can, you could help to verify errors already solved by developers, this will speed up the launch date of SME8!