Did you select "Register as a service" when you installed VRAY for Maya?
is the "VRayMayaSpawner" service running?
Qube really doesn't have to 'support' individual builds of VRAY if it supports the particular host version of Maya. Or put differently, since Qube 6.2.x supports mayabatch it will support any plugin renderers that run through mayabatch, such as VRAY for Maya.
We are running Qube 6.2.1, and VRAY for Maya 2.x via Maya 2012 no problem here...