udp socket trouble c# <p>I have 2 simple programs in c # using udp connections. The programs both have a client and server to send data back and forth. It works exactly as I Ted when ran at the same time on my laptop, using the ip address as 127.0.0.1</p> <p>However, when I put one program on another machine, and changed the ip addresses to the specific machines, it won't work at all. Any thoughts? </p> <p>Thanks.</p>