Problem Displaying Taskbars on Surface Pro 3 Multi Monitor Set Up

[radderfire]

Hi Guys

I am running a Surface Pro 3 with two external monitors via the dock. I want to display the taskbar on both the external monitors but in Taskbar Properties, it's not giving my the Multiple Displays section, and the "Show taskbar on all displays" checkbox, as can be seen in the screenprint of Taskbar Properties at:

http://www.eightforums.com/tutorials/5552-taskbar-hide-show-multiple-displays-windows-8-a.html

Anyone got any suggestions to fix this? It seems a bit strange as both monitors have been identified in "Graphics Properties".

Thanks