Maya 2015 64-bit Student Version Installs But Mental Ray Does Not Install

[Sakulex]

mental_ray_for_Autodesk_Maya_2015_SP5_Win.msp (msp - 36.32Mb)

The above files just doesn't want to execute for me; "The upgrade patch cannot be installed by the Windows Installer service because the program to be upgraded may be missing, or the upgrade patch may relate to a different version of the program"

Is this an upgrade, or the actual 'mental ray' plugin? 

[david.lau]

Make sure you have updated your Maya to SP5.
http://knowledge.autodesk.com/support/maya/downloads/caas/downloads/content/autodesk-maya-2015-servi...