HTML in Flash

I just can’t get it to work? Is it because I’m stupid? Or because it can’t be done? I’m looking to insert the following code in a Flash doc. because a forum I frequent doesn’t support html in signatures, but does support flash, so I figured I’d try to put this into a flash document…anyways, here’s the code, if anyone could tell me how to get it to work you will have made my week :smiley: :

<iframe src="" width="296" height="75"></iframe>