Cant login to Web Configurator

Hi, I've just bought the Armor G5 and after 2 hours of trying to connect to the web configurator I eventually got it set up using the app, unfortunately I still cannot access the web configurator using either http://zyxelwifi.com or http://zyxelwifi.net,  I can access the internet and everything else but i need to makes changes to the router that are not available in the App, I've tried plugging in directly to the 1GB Ports and also the 10GB port from my laptop still with no joy, also have tried connecting from my PC which is on the same LAN as the router, any help would be greatly appreciated.