Problem with Actionscript 3. Access of undefined property.

Hello there. I am new to animating. I have this cartoon I want to add Actionscript to. I am working in Actionscript 3.

Here is my code.

thescreet.addEventListener(MouseEvent.CLICK, fl_ClickToGoToWebPage_8);

function fl_ClickToGoToWebPage_8(event:MouseEvent):void
{
navigateToURL(new URLRequest("https://homestarrunner.com/"), "_blank");
}

It keeps giving me the error "1120: Access of undefined property thescreet." for the first line, first word.

I have triple checked now and everything is spelled correctly. If anyone could help, it would be a great help.

Thanks!