Linksys wrt54g will not assign address to macbook...

I don't know what to do. I have reset the linksys and rebooted the macbook numerous times. I don't have any idea why it will not pull ip. It just gets a 169.254.14.99 address.
I am on the neighbors wifi right now because mine will not work. I have 2 G3 dual usb white iBooks and a MacBook Pro that pull ips fine. This MacBook will not pull ip for nothing.
Any suggestions? I have upgraded the firmware on the linksys to 4.07 something or other? I think that is the newest.

Any suggestions? I have upgraded the firmware on the
linksys to 4.07 something or other? I think that is
the newest.
Are you using MAC Address Access Control?
Are you running a closed network (not broadcasting your SSID)?
Are you using WEP?
One of the problems with WEP is that the actual standard relies on a 10 character HEX key for 40bit WEP and a 26 character HEX key for 128bit WEP.
In order to make things easier for people, vendors use certain algorithms to convert simple alphanumeric passwords (or passphrases) into HEX keys, thus enabling people to use simple memorable WEP password rather than lengthy HEX keys.
The problem is that different vendors use different algorithms to generate the HEX key and therefore a ASCII password on an AEBS will be hashed differently on a Netgear client and vice versa.
One thing is a 13 character 128 bit WEP password will be hashed by all vendors in the same way (if you use 40bit WEP then a 5 character password is required).
Though sometimes not even that works and the HEX key must be used regardless.
AirPort: Joining an encrypted wireless network
http://docs.info.apple.com/article.html?artnum=106424
Choosing a password for networks that use Wired Equivalent Privacy (WEP)
http://docs.info.apple.com/article.html?artnum=108058
iFelix

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