Wireless does not work after installing Ubuntu

[rovertnnud]

I recently installed the OS Ubuntu 9.1 on a separate partition of my computer. Directly after installing it, I can't connect to any wireless connections on both my Windows XP and Ubuntu installs. In XP, when I try to repair it, it just stays on "Renewing your IP address" for 5+ minutes (i stopped timing after that lol). It knows there's a wireless network to connect to, it just refuses to do it. I know my wireless router is working because my other computers still connect fine and have internet access. I know that this may not neccessarily be just a Windows problem, but I haven't ruled out the possibility yet.

So far I've tried basically everything this forum (https://www.pcreview.co.uk/forums/thread-247032.php) says to:

• i've made sure my dhcp client service is enabled
• i've released and renewed iconfig in cmd.exe
• i don't have any network bridges
• all my network adapters are enabled
• i've run lspfix.exe & winsockxpfix.exe and they didn't work
• did the netsh int ip reset c:\resetlog.txt command.
• if i use a static ip address like what this guy does, http://corz.org/comms/hardware/router/static.ip.address.php, I can connect to the network.

None of these are working. Help me please!!