detectFASTFeatures not working in matlab 2011

Hello, I'm trying to run A= detectFASTFeatures(rgbNewA, 'MinContrast',0.1);%MATLAB

but i get an error, and when i wrote help detectFASTFeatures, it said no match found..

Answer 1

[Walter Roberson]

It appears to me that those were new as of R2011b. They are part of Computer Vision Toolbox.