Dynamic html text problems

Hi all, can someone help me with some dynamic text problems I am having?

I have an external .txt file which loads dynamically in my .swf. This is all fine but the only html tag that is recognised is the <br /> tag. <B></B> just will not work. When I try to add the bold tag it just removes that line from the text loaded. I would also like to add a tag to make certain words another colour but this doesn’t work either. I have the render as html button pressed. It’s strange how the <br /> tag is the only one that works.

Is there something I am missing?