Aweber autoresponder form in Flash

I use Aweber and have a flash website that I built. I have done some research and I can't figure out how to use an html form in flash. I could build a form in flash and use a php script but how can I tie that to my Aweber account. In Aweber and Interspire Email Marketer they create the form for you in html.

What am I missing here?

Thanks for your help...