The network did not assign your PC a network address

Here's the deal.I have a DLink Xtreme G wireless adapter, and just recently my laptop can't connect to the network. There isn't something wrong with the laptop because it has been able to connect to other unprotected networks, but can't connect to mine.It says it has limited or no connectivity. Right now it is directly next to the adaptor. ''The network did not assign your PC a network address.'' That is what is says.I've unplugged and replugged the adaptor, restarted my laptop, but those haven't worked. This really stresses me out, so can someone help me get a good strong connection? I can't even access the Internet ;_; from it. Please explain everything layman's terms because i don't understand techno-language that much. Ok, here is some data:Wireless Network Connection (CORTEX) that's my network
Speed: 54.0 MbpsSignal Strength: ExcellentStatus: Limited or no connectivityI'm using Windows XP Home EditionHELP!The network did not assign your PC a network address
Please help! So far every place i've searched on the Internet, they use computer lingo i can't understand.The network did not assign your PC a network address
Try... start run, write cmd, then type ipconfig/renew.