Posted 12 July 2008 - 07:03 PM
If it worked upstairs, that would mean you've set properties of TCP/IP correctly for the wireless connection.
So what I would do is reboot the computer you moved.
Normally reboot would re-aquire IP once again, since it may well have changed depending on your ISP. It might work.
And/or go back upstairs, read off all the data in ipconfig /all and make sure to set it all up the same way downstairs.
In your firewall, is the router permitted as the DHCP server? I suspect you have that done correctly.