why i am getting error on command mex -setup c after installation of SDK for MATLAB 2014b

when i entered command mex -setup c i got "Error using mex No supported compiler or SDK was found. For options, visit http://www.mathworks.com/support/compilers/R2014b/win64.html." From that link i have downloaded SDK with .NET framework4, but i am getting same error. please share the solution.

[Geoff Hayes]

Siva - turn on verbosity for the setup. In the command window type

 mex -v -setup

and copy and paste the results to your question. It could be that an environment variable is not set or something like that.