I have been trying to develop an internet program on Visual Studio 2005 express edition, I won't get too far into details since it is not important. Anyway, I had earlier made a program kind of like this on Visual Studio 2003 and it had worked just fine. To test the program I have both the client and server on this computer. I just used for the IP just because it is faster until now. I wanted to try to test the program on my internal ip ( However when I try this, i get an exception which says that the machine did not respond in time. When I try the program on Visual Studio 2003, though, it works perfectly. To add further to the problem i opened up the command prompt and pinged this computer. It keps saying that the request timed out. Does anyone have any clue what the problem is?