thingSpeakWrite Error in MATLAB

clc;
thingSpeakWrite(428709,2.1,'WriteKey','TPEDY9K40AU84YVI');

Answer 1

[Hans Scharler]

Do you have the ThingSpeak Support Toolbox installed? If so, what version of MATLAB are you running?

[walid irfan]

yes i have installed that toolbox and my version is 2015

[Rashmi Shrivastava]

please solve this problem. I am also getting this problem