troublesome component?!?!?!

[bonjour]

hi, i am using a listbox in my project, however i am in some trouble now. the list box is in a swf which is in level 10. the problem is i wish to clik one of the item in listbox to go back to my level0 and unloadmovie(10), but it doesnt work, this is the first problem.
secondly, i have a movie clip with instance name of organizationDivision, placed in the _root of level10, similarly, i wish to use one of the item in listbox to call the organizationDivision mc, but it doesnt work.
anybody can help me to see where is my problems?? thx alot.
my actionscript :

list.addItem("Chemical", "css.swf");
list.addItem("Equipment", "ess.swf");
list.addItem("Gas", "gss.swf");
list.addItem("Life", "lss.swf");
list.addItem("Quality", "qas.swf");
list.addItem("Tank", "tfs.swf");
list.addItem("Technical", "ts.swf");
list.addItem("SOX PAGE", "sox");
list.addItem("Management Team", "_root.organizationDivision");

function displayDetails(c) {
var j = c.getSelectedItem().data;
if (j == "css.swf") {
level = 20;
} else if (j == "ess.swf") {
level = 30;
} else if (j == "gss.swf") {
level = 40;
} else if (j == "lss.swf") {
level = 50;
} else if (j == "qas.swf") {
level = 60;
} else if (j == "tfs.swf") {
level = 70;
} else if (j == "ts.swf") {
level = 80;
} else if (j == "sox") {
_level0.play();
unloadMovieNum(10);
} else if (j == "_root.organizationDivision") {
tellTarget (j) {
gotoAndStop(2);
}
}
loadMovieNum(j, level);
}

list.setChangeHandler("displayDetails");