yea , do you use hamachi ??
and check your firewall , open port 80 and try it again
the best way to try it out to see if it works is by going to your EXTERNAL ip ( not the 1 that starts with 127.0.0.1 or with 192.168.X.X or with other numbers that get used to acces your router )
then check your firewall , disable it complete if you dont know how to set it up like it should be
then check your router and disable the firewall there to if you dont know how to forward ports for your router
if the router firewall cant be disabled (setting it to minimum is not disabled) then press that button that says that it open all ports on a specific computer (fill in your ip , normal there stands a prefix of 192.168.1.X and fill your last number of your local ip on that X , safe and wait 1 min so router is restarted and done)
if that doesnt help , then something els is blocking your outer conection
thats the reason why you can see it , your brother that sits next to you can see it on his pc but no1 els can :d
Greets From The Crasher