Connecting 1 Windows 7 Machine And 1 Windows Xp Machine

ive got 2 computers hooked up to a router by Ethernet sharing an internet connection, the internet connection works fine for both computers. i would like to share documents also between the computers

-one is a windows xp 32
-one is a windows 7 64

ive set up many networks in the past with a bunch of xp machines without any trouble but now i am having trouble my first step was on the windows 7 machine, i went to control panel -> network and sharing center -> setup a connection or network -> set up a new network this is where i believe i am making a mistake of some kind, it seems that the windows 7 machine is assuming that i want to set up the network wirelessly, when it is connected to the router via Ethernet. it simply brings me to a screen that says choose the wireless router or access point you want to configure, and hangs there with a greyed out next button everything seems to be going fine on the xp machine, i created a new network called "sharebear", told it that the computer connects through a residential gateway, enabled file and printer sharing, rebooted the machine, and confirmed that there was a new folder in the network places for shared documents.i went back to the windows 7 machine where it was still hanging, rebooted it, looked for the new network in network and sharing center and it wasn't there, i tried again to "set up a new network" on the windows 7 machine with the same hanging screen.