so you have win98? are you able to access the internet on another wired comnputer?
or can you get the internet at all?
if yes>try this....start>run>type in "command"...a dos window will open. type in.."ipconfig /all"
please post back the answers to...ip address ex:192.168.1._ and gateway ex:192.168.1._
if you do not get a 192.168.1._ number on either one of these ip's, then ytou have not successfully connected your computer wirelesssly to the router.
as far as a passphrase goes, in the linksys wireless configuration, this is not necessary unless you have set up a passphrase, this is a wireless security setting that is configured in the router. routinely, people use a 64 or 128 bit "WEP" key, this is configured in your router under the security>wireless tabs. unlesss you specify a passphrase, it is not necessary to connect, but you will still see the option in the wireless utility. it gets a bit complicated for a beginner, so i will give u a link on how to properly configure your gear.
simply follow the directions to get specific help... http://linksys.custhelp.com/cgi-bin/linksy...?p_sid=H94zjK2i
if you cant connect with wired comnputer, post back to see if it is a configuration thing in the router, or perhaps a miswire in your LAN..anyway here is your link, please post back to let us know how u made out!