Setting Up Alert For Refused Connections

I'm trying to get alerted when the MySQL database has any refused connections.

In Monitors / Connection History / Refused, I've set:

Alert condition:

function()

{

return GetWarnStatusInt(this.Value, this.Critical, this.Warning, true);

}

Warning: 1

Critical:10

I then made 21 connection attempts with a bad password. The Refused counter showed those bad connection attempts, but the Alert condition never shows Warning or Critical.

Any idea what I am doing wrong?

Thanks!