Im an array n00b

Ok, I’m trying to get better with my AS skills, and have run into a little problem with arrays. Heres what happens, I load a txt file, flash takes one of the strings from the file, and spilts it into an array. Here is what I have:

loadcaptions = new LoadVars();
loadcaptions.onLoad = function(){
	captions =
	textbox.text = captions[1];

the file’s contents look like this:

info=this is thing 1~this is thing 2~this is thing 3~

problem is textbox displays nothing. what am I doing wrong?