HELP! Trouble with publishing

I’m making an entirely Flash-based website and I have in the site a Dynamic Text Box. The text within the text box changes based up which category (represented by animated buttons) the user selects to view. I have the “Render Text as HTML” option ON so that I can use HTML tags to easily format my text (especially since each category of text is not formatted the same way and I need some independence in this regard). Also, I am NOT loading text in from an external file, but rather specifying text for the text box within each button’s “release” event. In each button’s actionscript, I have code that looks like the following:

_root.txtMain.htmlText = "<all of my text starts here>";

My problem is this: I have the text formated precisely how I want it inside of Flash, but when I publish the movie and up it to the web all the formatting is lost. I have tried several things and I’m losing my mind here. Can somebody please help me out? Thanks in advance.

Flash is very limited in the way it can format stuff, check the help for the allowed tags
When you say all do you lose simple things such as bold etc?

Yes, I lose everything including <b>, <i>, <u>, <a href>'s, and <img>'s. Also, when I view the .swf file generated from my .fla on my own system before publishing, it is perfectly formated and such. It only becomes totally unformatted after I have upped it to the web. I’m thinking perhaps that there is a confliction between typical HTML behind the web and that which I used in my Flash movie.