How to create a configuration set for simulink model from matlab command line

I want to create a configuration set for simulink model from matlab command line and I looked at the documentation given in http://www.mathworks.com/help/simulink/ug/configuration-set-api.html

I used the following command to create a config set but matlab returns an error.

 % Create a new configuration set
  cset1 = Simulink.ConfigSet;

Undefined variable "Simulink" or function "Simulink.Configset".

Can anyone help me?

[Kaustubha Govind]

Perhaps you're using an older version of MATLAB when this command didn't exist? Could you try opening the documentation installed with your version (type "doc" at MATLAB prompt), and search for "ConfigSet" in the help browser.

[Shyam Mudiraj]

Wow, the error was due to the fact that I typed "Configset" with a small s instead of "ConfigSet".