3dsmax mental ray help

[_Nabeel_]

hello....
i was trying to render my 3d model with mental ray...and seen some tutorials on net but now suffering with a problem.
I first created daylight system and then tried to modify it changing it to mr Sun and mr Skylight....
but when i selected on modify tab,and tried to change to sun to mrSun,then there was not the option of mental ray....
only IES Sun and Standard options were present and no other option....
i want to use mental ray and am unable...
if someone could help me to drag me out from this problem,then it would be great....
if something needs to be enabled or disabled?

Hope someone could help me...

 

[_Nabeel_]

some one please help......

 

[omkarjere]

Can't u directly use "mr Sky" light ? its there in Photometric lights