OK, make sure you've downloaded the relevant drivers:

http://www.ff.iij4u.or.jp/~ngc/eng/newtwave.htm

Set your base station to WEP or unencrypted.

go into Owner info and set up a new worksite and add all your details, wifi setup etc in there. Then when you use Newtscape (or whatever) to surf, connect using that worksites info.

It can take a while to fine tune so be patient.