same computer wired works-wifi doesn't

Windows 7 computer hard wired to network. All is well. Can see the other computer and mapped drives all connect. I have the need to move the computer so I unplug it and turn on the wireless. Finds network, internet up, but no computers and mapped drives won't connect.

I started a workgroup from a vista machine and established the network via thumb drive to all computer and they all work fine. When I open the "computer" icon on the windows 7 machine the info at the bottom of the window lists the name of the computer correctly and the workgroup correctly when connected with wires or with Wifi.

Just can't find computers.

Any help would be great.

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