VR SLI not supported in 2*Quadro P4000

Our system info is

OS : Windows 10 Pro (64bit)
Graphics Card : 2 * Quadro P4000

Driver Version : Version 430.39

Our problem is when we run vr sli opengl samples in VRWorks Graphics SDK 3.1,
“Extension GL_NV_gpu_multicast not found” happens.

When I check OpenGL Extension with OpenGL Extension Viewer from realtech VR(http://realtech-vr.com/admin/glview), there is no extension such as NV_gpu_multicast, NVX_LINKED_GPU_MULTICAST to be required to run OpenGL multicast.

Is OpenGL multicast not supported in windows or is there any other way to solve this problem?