Hi,
V-Ray 3.7 is not supported in 3ds Max 2013. However, V-Ray 3.60.05 should work fine - the ForestVRay36.dll file has been included to ensure compatibility with V-Ray 3 on 3ds Max 2013. For all other versions of 3ds Max, only version 3.7 is supported. I hope this clarifies the situation.
Best regards,