Sending data to other networks using ethernet shield AND ARDUINO

I was successfully in sending a string from an ethernet shield connected to my system to my own ip address. Like i typed the ip address of my system given by ipconfig and entered it on the address space on web and it worked by running the WEBSERVER SKETCH. Now i wish to send the same string on another system configured on another network. How should i achieve that?

Hi, goldriver,

goldriver:
Now i wish to send the same string on another system configured on another network. How should i achieve that?

you need to be more specific. To another network? Are they connected? Is there a firewall preventing something? Same subnet? Same IP range?
What is not working exactly?