error: vad?

**Error** Scene=Scene 1, layer=I.B.2, frame=1:Line 1: Mouse events are permitted only for button instances
on (rollOver) {

**Error** Scene=Scene 1, layer=I.B.2, frame=1:Line 5: Mouse events are permitted only for button instances
on (rollOut) {

**Error** Scene=Scene 1, layer=I.B.2, frame=1:Line 9: Mouse events are permitted only for button instances
on (release){

Total ActionScript Errors: 3 Reported Errors: 3

Är det någon samhar någon HELST aning om vad detta konstiga kan betyda? jag använder denna kod:

on (rollOver) {
_root.mouse_over_HomePage = true;
}

on (rollOut) {
_root.mouse_over_HomePage = fstartlse;
} 

on (release){
getURL("http://www.toxiclab.org/");
}

och 

_root.HomePage.onEnterFrame = function() {
if (mouse_over_HomePage) {
_root.HomePage.nextFrame();
} else {
_root.HomePage.prevFrame();
}
};

tagen ifrån denna site