Sounds like routing issue. Posting the result of ipconfig /all may help.
--
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
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"J David Ellis" <nospam@home.org> wrote in message
news:7aGdnZKEvvni9Q_anZ2dnUVZ_jSdnZ2d@sti.net...
> computer A is connected to computer B via ethernet crossover cable.
> computer B is also connected to a wireless network. computer A does not
> access the internet.
>
> when i run firefox and thunderbird on computer B, they choose the wrong
> network, seeking the internet on the local area connection instead of the
> wireless network connection.
>
> what do a change to cause these programs to choose the wireless network?
>
> --David