Yes - to use Yahoo Messenger on the APNK wifi network you need to set a proxy.
In Windows
Note - when you have finished using the APNK wifi you should untick this proxy setting OTHERWISE you will NOT BE ABLE to use the Internet on other networks.
In Yahoo Messenger
You should now be able to log in.
You may be able to use this workaround when on the APNK wifi for other applications on your laptop that try to connect directly to the internet.
Is the internet filtered?Information on the internet filtering in place on our PCs and wifi.