Access panel with a valid domain (using valid IP on the Internet)

[kfot]

Hello guys.
I'm having trouble accessing the panel ispcp-omega-1.0.7, I install ispcp using a valid IP on the Internet (IP internet and not the internal network) and when I access the panel ispcp get the message "Page not found ".

comments:

1 - I am using a valid domain: http://www.domain.com.br
2 - In step "Please enter a fully qualified hostname [serverdb.w3sistemas.com.br]"
3 - In step "Please enter the system network address [% s]: 187.xx.xx.xxx"
4 - In step "Please enter the domain name where ispCP OMEGA will be
reachable on [cp.domain.com.br] "
5 - I'm using fixed IP Internet, the connection is based on a network of 5 computers that connect to the Internet by a router.

And as I said I can not access the panel ispcp using these settings in the installation, but if I use the internal ip network access during installation of the panel's internal network but not internet.
In step 3 above mentioned installation ispcp by default does not give me the ip of the network or the internet but it gives me the symbol [% s] that may indicate a problem?

Someone could help me with this problem?

I thank everyone.

thx