Really weird AS problem(simple script)

programming flash
1 
_root.leftmenu.kurs1.kursbtn.onRelease = function(){
    _root.leftmenu.kurs1.gotoAndPlay("kursrollIn");
}
_root.leftmenu.kurs1.valpbtng.onRelease = function(){
    _root.leftmenu.kurs1.gotoAndPlay("valprollin");
}

I triple checked that the all the instance names are 100% correct, that the frame names are correct and that the script doesnt have any errors. But this script just wont work =/.

THe first button works, the “kursbtn” one. But the other one wont even register(I dont get that hand mouse thingy when i mouseover the MC). I tried putting a new MC and making it into a button in _root.leftmenu.kurs1 but it didnt work either.

I put a button on the _root and it worked fine, so the

_root.leftmenu.kurs1.gotoAndPlay("valprollin");

row of the code is working properly. Has to be something with the

_root.leftmenu.kurs1.valpbtng.onRelease = function(){

row.

Thanks for you time and sorry if my english is confusing and bad.