Extending Contact Form 7: custom validation not working

I’m using add_filter to hook in and add extra validation but nothing happens on the front end at all. It all gets ignored. What am I doing wrong?

Code:

function my_wpcf7_validate_text($result,$tag) {	if($name == 'CANZipCode') {
		$CANZipCode = $_POST['CANZipCode'];

		if($CANZipCode != '') {
				if(!preg_match('/^[ABCEGHJKLMNPRSTVXY]{1}\d{1}[A-Z]{1} *\d{1}[A-Z]{1}\d{1}$/', $CANZipCode)) {
				$result['valid'] = false;
				$result['reason'][$name] = 'Entered Zipcode is Invalid';
			}
		}
	}
}
add_filter('wpcf7_validate_text*', 'my_wpcf7_validate_text', 10, 2); // Req. text field
add_filter('wpcf7_validate_text','my_wpcf7_validate_text', 10, 2); // text field

Then, in contact form 7’s admin page:

[text* CANZipCode]

https://www.ads-software.com/plugins/contact-form-7/