You have to make the changes from the node itself, or from a router that has the same "external IP" as the node.

I assume you are running nodes on the IRLP VPN if you have three of them. If that is the case, you have to turn off the VPN, update the IP address of the node on the IRLP servers, wait a few minutes, then you will be able to choose between the nodes behind the same IP as your browser.

If you want to bypass this, just edit the status page info on the node itself:

https://www.youtube.com/watch?v=H1AGGq1HmkQ

David Cameron