Vertical shooter, small code glitch

ok so i have made the vertical shooter from the tutorials, but i changed the shooter and the dragons to different objects and names. the code is exactly the same. but i get a message saying: Error Scene=Scene 1, layer=actions, frame=1:Line 66: There is no property with the name ‘onEnterFrame’.
loka.onEnterFrame = function() {

so this is the code… what is wrong?
//---- variables ----
var steps:Number = 5;
var spriteX:Number = 265;
var spriteY:Number = 265;
var speed:Number = 25;
var droppeActive:Boolean = false;
var loka:Number = 3;
var i:Number = 0;
var score:Number = 0;
//---- properties ----
flaska.swapDepths(10);
//---- functions ----
function checkKeys() {

if (Key.isDown(Key.RIGHT) && spriteX<510) {

spriteX += steps;
flaska.legs.play();

} else if (Key.isDown(Key.LEFT) && spriteX>40) {

spriteX -= steps;
flaska.legs.play();

}
if (Key.isDown(Key.UP) && droppeActive == false) {

flaska.arms.play();
attachMovie(“droppe”, “droppe”, 8);
droppe._x = spriteX;
droppe._y = spriteY+50;
//droppeActive = true

}

}
function updatePawel() {

flaska._x = spriteX;
flaska._y = spriteY;

}
function updateDroppe() {

if (droppeActive == true) {

droppe._y -= speed;

}
if (droppe._y<-10) {

droppeActive = false;
removeMovieClip(droppe);

}

}
function initLoka() {

for (i; i<loka; i++) {

attachMovie(“loka”, “loka”+i, i);
loka = _root[“loka”+i];
updateLoka(loka);
**loka.onEnterFrame = function() { **----------------------THIS is what the error msg is about

if (this.hitTest(droppe)) {

score += 5;
trace(score);
droppeActive = false;
removeMovieClip(droppe);
updateLoka(this);

}
if (this._x>0) {

this._x -= this.velo;

} else {

updateLoka(this);

}

};

}

}
initLoka();
function updateLoka(which) {

which._x = random(100)+530;
which._y = random(80)+20;
which.velo = random(10)+2;

}
this.onEnterFrame = function() {

checkKeys();
updatePawel();
updateDroppe();

};

Same problem here, please help me if you can solve this. Thank you in advance