#1

tell me how to fix the error : Error with speech recognition init: Object reference not set to an instance of an object.

#2

Is this in EZ-Builder or the SDK? I ask as the tags you chose imply it's the SDK but experience tells me it's more likely to be EZ-Builder.

What language is your voice recognition set to in Windows? Is voice recognition set up correctly win Windows? This is all accessible via Control Panel and must be set up and working (and trained).