NVIDIA GRID driver is unable to check out a license from the license server when using 4Q, 8Q or Passthrough profiles for the M60/M6 GRID cards. E.g. M60-4Q, M60-8Q, M6-4Q, M6-8Q profiles.
Drivers prior to the 3.0 code release required a vWorkstation Extended license for 4GB or greater profiles.
Since March 2016 NVIDIA ceased to ship the Extended license as a result of the changes in licensing.
If customers / partners are deploying licenses acquired after March 2016 they will require the 3.0 or later driver bundle to use profiles larger than 2GB.
Update to 3.0 driver bundle or later. Advice on finding the drivers is detailed here: http://nvidia.custhelp.com/app/answers/detail/a_id/4120
GRID 2.0 and up - M60/M6 cards
Pre 3.0 drivers