Flash animated button symbol can not add action, what is the reason

1, question: the action of adding the first frame button symbol in the animation, but it is not in the symbol definition. What"s going on
2, code: on (rollOver) {gotoAndPlay (2);

}
3. Screenshot of the question:
incorrect:

clipboard.png

:

clipboard.png

4, how to change the wrong to correct, where is the problem, trouble God for advice, thank you. -sharp-sharp-sharp problem description

the platform version of the problem and what methods you have tried

related codes

/ / Please paste the code text below (do not replace the code with pictures)

what result do you expect? What is the error message actually seen?

Oct.22,2021

is still developing flash? In fact, the button components in
flash have only some effects. You have to deal with the corresponding response events where the components are used, that is, the relevant logic (code) is generally not where the button components are defined, but where the components are called.

imagine that this effect is actually just a change in the state of a button before it is pressed, and there is no need to deal with the action after the button is pressed, so this screen is actually a situation in which the mouse is put on a dynamic effect, moved away and restored.

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