help me i am newbie

[stone]

hello guys I am new I want to make simple server to play with my cousins on LAN but i am unable bcoz I cant my own server on lan , we all cousins are using xp 32 bit when i make server from HLDS I get my ip like 192.168.1.8:27015 i cant see my server in LAN tab :/
and not showing in LAN tab

please help me Thanx in advance + sorry for my bad english

[dayto123beast]

my only guess would be to have them open up Console and type Connect 192.168.1.18:27015