Html in Flash

I have searched for topics and tutorials on using html in flash and still can’t seem to get them to work. I have used the scripts that were in the sections I found and even had the “Render text as HTML” button activated. But it still doesn’t work. Pretty much I just wanted to make it so when a button is click, it enters down to the next line in a text field, + a little extra few words. So something like this is what I thought would do it.


on(release){
  entertxt += "<br>"+"this is" + "something " 
}

But this didn’t seem to work. It wouldn’t enter down, but just continued along the same line.