Your welcome, make sure that you use dns-nameservers of your internet provider in all three, router, server and your PC internet settings and you should be able to connect to your website from inside of LAN. If you use your internal domain servers (router's or server's) it can point to your router. Who is your IPS btw? If its Virgin or NTL you can use 192.168.4.100 and 192.168.8.100. Other I do not know.
Only when unplugged.