If you go onto 'join internet game' from multiplayer options in nwn, a list of servers will appear. On the left hand side there's a submenu. Select 'Roleplay'. Make sure that on settings, you do not have 'Password Protected Disabled'. Layolara should appear on the list as red, seeing as it requires a password. If all the list of servers is greyed out, you will need to download the latest version of nwn, on 'Update' from the first nwn menu.
Hope I helped. =)