Intranet account connection

I have setup two identical systems:
Laptop HP Pavillion dv9500
Desktop HP Pavillion a6207a
OS on both Vista
Internet connection with wireless and all is working well.
I setup both to be a server for intranet BUT the laptop will only work as
locahost and other pc are able to ping IP but not connect.
Desktop and Laptop setup parameters are identical.
What is the problem?????

PS Also when using internet address www.bell.ca the browser will hang. If i
remove www and just use bell.ca it is OK.
Tried different browsers wi no success, same problem. My old Win2000/ie6
system works with no problem.
george