Switch between First Person and VR

We are working on a project where we will be switching from “first person Map (where we are entering some login details of the player)” to “VR Template Map( where architectural VR template is there with some controls to change the textures of the walls and floor real time)”. So now the problem is we are able to switch, but after entering in to the architectural set … we are not able to operate the controlls… widget is visible but the buttons are not clicking, we are not able to select objects like walls etc…

Please find the image attached how did i switch between the modes.

What could be the problem, else do we have any other alter native to do…

could you help me out…

can you explain to me or show me, what this function Re posses looks like?