Networking between Vista and XP - Nothing Working at all

I have recently upgraded my home PC from Windows XP Pro to Windows
Vista. While my Laptop continues to run Windows XP. Previously I had
no network problems with my wireless network. Now I have absolutely no
connection between either machine. I cannot ping using the name or the
IP address. I cannot see either machine using the UNC paths. I have
tried everything including disabling the firewalls on both machines
but nothing seems to work. Not a sniff. Any ideas or help would be
great.

Cheers

Colin

My fault, my new router, was set to have all wireless connections
separated from each other.

Cheers

Colin