The wireless network settings should only need the TCP/IP protocol with Obtain DHCP Address/DNS assigned as the primary settings.

The following is an example of the correct TCP/IP DHCP settings.

The following are directions for checking the DHCP settings:

Windows Vista - http://windowshelp.microsoft.com/Windows/en-US/help/e070bf7b-6d5e-4f49-b4f7-10aa8d8b11e21033.mspx

Windows XP - http://www.microsoft.com/windowsxp/using/networking/expert/russel_02june17.mspx#ETD

Mac OS X 10.4 - http://docs.info.apple.com/article.html?path=Mac/10.4/en/mh2066.html