I currently have my Decos set up in AP mode with no issue.  I am changing ISPs and can now use my own router, so I'd like to change to router mode using the main deco as the router.  Is there a process for changing modes ? I am unable to get a WAN ip after changing modes. Here's what I did.

1.) While still on my old internet connection, I changed the operating mode to router mode, it reboots and comes up in router mode, but still going through my old internet.

2.) put new WAN cable into the 2.5gig port, reboot. It will not get a wan IP off the new connection.

Hopefully there is a way to move from one operating mode to the other without entirely rebuilding my network.