Question [Q] RK3188

I have installed the latest Beta on my TV Player which uses the Rockchip RK3188. 2GB DDR3 with 8 GB Flash It is currently hooked to a 1080P monitor and the Google TV OS shows resolution is set to 1080P but in XBMC the arrows to change the resolution are not grayed out but it wont change from just below 720P.
I have successfully played videos at the 1080P resolution using the video player in Google TV. My test video is a 11Gig MP4 Blu-Ray rip of Avatar. Any help getting the resolution to 1080P in XBMC would be appreciated.