Simple photogallery question

Two things; First I created a photogal that buttons load pics. Not using the loader component, they are just movie clips.

So I prescribe the action:
on (release) {
gotoAndStop(2);
}

For all four buttons its the same w/ the appropriate frame.

Why do I get this error?

****must appear within on/onClipEvent handler
stop();

Total ActionScript Errors: 2 Reported Errors: 2*

Second question; So I have four buttons with four pics on different frames. When the movie is first played there is nothing there you have to click a button. How do i get one of the buttons to be the default when the movie is loaded? I’m sure there is a logical, easy explanation for this, Im just a huge newb. Thanks in advance!