Hover Captions

I have been following this tutorial to create rollover captions but want to add a second line of text in the caption. I have turning the text box where the caption is held into a multiline text box and then a line break in the string that you pass into the function, like so:

b1.onRollOver = function() { 
   captionFN(true, "first line of text<BR>second line of text", this); 
   this.onRollOut = function() { 
      captionFN(false); 
   }; 
};

I haven’t had any success though, can anyone help?

This is my .fla