vista and xp vmware

I have windows vistax64 running on a physical computer and windows xp as virtual machine. When i'm trying to access from XP from webbrowser my web server on vista it shows me page - you are not authorized to view this page. is this some sort of new security in vista ?
thank you for your answer

let me simplify the problem,

i cannot access my web server on vista from another computer. My webserver is apache (wamp). When i type in my webbrowser http://192.168.1.2/ (my vista address), it shows the HTTP 403 (Forbidden) page - You are not authorized to view this page