ActionScript 2.0 :: GetUrl Is Canceling Out Animations?

This is AS2. I have a mc that is functioning as a button. On the mc timeline the actions frame contains the code at the bottom, and it everything works fine. Except when I try to add the getUrl statement. Here is the statement
on (release) {getURL("http://mysite.com", "_blank") ; }

here is how I try to add it. When I'm on the main timeline, I click on the mc. then I click on the actions panel then I insert the above code. When I do, Then all the animations etc. in the button is cancelled out, but It does get the url. How do I get both the animations and the geturl to work together. below is the code contained inside the mc.

// When mouse pointer over the button
box_color.onRollOver = function() {
box_color_play = 1;

[Code]....