I have the same problem; I have a Surface PRO 2 that works great with this plugable device:
http://www.amazon.co.uk/Plugable-Uni...ds=displaylink
But it does not work with the Belkin USB 3.0 dock. The dock is connected ok; (a USB key put into the dock is seen on the computer) but nothing appears in the device manager - there is no USB Display Adapters.