VS 2010 Socket with Internet IP

I'm trying to create a chat with sockets, but when I use the connect function, an error message is displayed, 'saying' that the ip address is not valid.

ip I'm using is: 177.64.42.142

But if I put a local ip address (192.168.1.102), the program works, but only on my network.

how can I use an internet ip address on sockets?

[sorry for my bad english]