Jase,
to CF.
What OS & service pack are you running? XP SP2 is probably the easiest for wireless.
What error do you get when you try to connect? What does it say about your network in the 'available networks' list, eg 'Security Enabled Network'?
According to
this guide, there is no wireless security on this router by default - have you set any? No security is fine for testing but you will want to beef it up!
You also might want to suggest you neighbour up's his security! There could also be an interference problem - his might be on the same or close channel as yours. Try resetting the wireless channel to 1 or 12 to see if that helps.
HTH