Trouble to connect with Linksys Wireless-G USB adaptor

I have a D-link AirPLus 802.11g router with a Linksys Wireless-G 802.11g USB adaptor on my notebook for internet access. My ISP is Earthlink Cable with Times Warner. The adaptor worked fine all along. But recently it couldn't get an IP from the DHCP server somehow. I checked its TCP/IP setting. They're all fine. It's set to automatically getting IP from the DHCP server. Can some of you experts help me to troubleshoot?

The status on the router shows

Command IPCONFIG on the said notebook shows nothing for fields like

DNS Suffix Search list Connectionn-specific DNS suffix DHCP Server DNS Server

Its IP address is a self generated IP, different from

I did ipconfig /renew. It would say it can't get an IP from the DHCP server.

The IPCONFIG on my other working wireless desktop, which has a D-link AirPlus Wireless 802.11g USB adaptor, shows:

C:>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : workstation03 Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Unknown IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No DNS Suffix Search List. . . . . . : earthlink.net

Ethernet adapter Wireless Network Connection:

Connection-specific DNS Suffix . : earthlink.net Description . . . . . . . . . . . : D-Link AirPlus G DWL-G122 Wireless U SB Adapter(rev.A2) Physical Address. . . . . . . . . :

Congrats.

I was going to say something nasty about MS WZC (Wireless Zero Config) but I couldn't tell for sure if you were using WZC or the connection tool that came with your Linksys USB radio. Microsoft did a rather nice job of dealing with ASCII vs Hex and 64 bit vs 128 vs no encryption. Just type in the key and it will guess its way through the combinations and permutations. That part works fairly well. However, they forgot to include any kind of diagnostics or error messages. Not even a log file buried where mortals can never find it. The only clue that you have a WEP key mismatch failure is that WZC shows "connected" followed by "Obtaining IP address". It sits at "Obtaining IP address" for about 2 minutes until it times out, where it delivers an IP address of 169.254.xxx.xxx and announces that you have "limited connectivity". For all the work MS did on XP SP2, one would think that error recovery and logging would have been implimented and tested. Nope.

You're right. The key somehow was erased. But it didn't complain about that when making the connection. And the connection can actually be made but no ip was assigned. After I retype the key, the internet was back to life.

So simple for such a big headache.