Ajax event not working

I have created a virtual field on my grid application (using “Field/ New”). I have create an Ajax .onClick event for it. I put the following code into the event:

$message = 'You clicked PUSH: ‘.{NAME}.’ - '.{OBJ_GUID};
sc_ajax_message(‘Your Ajax Event Fired’, $message, ‘top=180&left=500&timeout=3’);
error_log(“Why is this not working”);

The Ajax .onClick does not fire, and does not make a log entry, when viewed with phpinfo.php

What am I doing wrong?