RT-N66U + EA-N66 as an AP: IP conflicts

Hi there,

I have the following setup:

RT-N66U as my default router, hooked up straight to the cable modem. Running Asuswrt-Merlin. From there I have hardwired a TEG-S50g TRENDnet switch, and from the switch an EA-N66 to use as an AP.

CABLE MODEM>N66U>SWITCH>EA-N66

I also have a desktop hardwired to the switch.

Settings are as follows:

RT-N66U: IP:192.168.1.1; DHCP: on; IP starting: 192.168.1.3
EA-N66: AP mode; IP: 192.168.1.2; DHCP: off

Everything works well until I reboot the desktop. When I reboot the desktop, I get a normal IP, however my gateway changes to 192.168.1.2, and whenever I try to open up I website, I am redirected to the AP control panel.

Any idea what could be causing this?

Thanks :)