ScaleIO volumes as RDM

Hi experts

My ScaleIO cluster works on physical Windows servers.

If I create a volume and map it to 2 physical servers with MSCS, it works fine.

If I create a volume and connect it to 2 VM on different ESX hosts (Cluster-Across-Boxes) as physical RDM, it doesn't work. I can't add connected volume to cluster disks.

ESXi version is 5.5U3, Windows version is 2012 R2.

My question is - can I use ScaleIO volumes as RDM devices for MSCS on VMware VM?