Welcome to the site
First get your iPaq syncing and working how you want WITHOUT wifi (as you cannot set up a partnership with wifi) - also make sure that your Parnership name when you create it do this does NOT include an 'strange' character - such as the "_" that the default name has

as wifi does not work with such characters (don't even ask why MS would create a default name that automatcially STOPS you from using wifi

).
Then, follow the steps in Ike's wifi guide - there is a link to the guide in my MyPDA - linked under my username.