What does it say? 52100? Do you have steam? Disable firewall, Pots 80. Restart computer?
Security software on your computer may be stopping this from working, try temporarily disabling any security/firewall programs. Otherwise check your router's settings to see if it has any sort of LAN security policies in effect. Follow the instructions in the question above to see ipconfig info, copy down the "default gateway" address into the address bar of a browser and press enter. A login box should come up. The username should be "admin" or blank, and the password can be anything from "admin" to "administrator" "pass" to "password" or "password1", or something else if you've set it differently. Ask whoever set up the router what the password to get into it is, or check this page. http://www.phenoelit-us.org/dpl/dpl.html Failing that, try it from a different computer. Also try opeaning port 80. Not sure if that will help but it’s worth a shot.