problem accessing web app from outside network

Hi, my port 80 is open but i still can’t access the crm app from a computer outside our network. I already have a static local IP outside the range used by the dhcp, opened ports in windows firewall, wireless settings which is inside the windows firewall, also in our router home page, all both udp and tcp.

what do you think is the problem?

it followed these steps:
maniacomputer. com/webServer/IIS.html
maniacomputer. com/webServer/Router.html

and these steps:

boutell. com/newfaq/creating/hostmyown.html
boutell. com/newfaq/creating/firewallports.html

i can only access it from computers in our home network. i tried accessing using my brother’s iphone but it says the server stopped responding