One of the tasks for a search engine is to separate content from html. There's a popular thought in the development community that valid html makes it easier for the search engines to determine what's content and what's not. so step 1 is to fix the html errors on the page -
http://validator.w3.org/check?verbose=1&uri=http%3A%2F%2Faffiliate-marketing.50webs.org%2FRegarding accessibility... Get rid of the font tags and replace them with CSS. For font sizes, use % or em units. Some versions of IE and and other browsers don't allow the user to increase/decrease font sizes if the size is explicit. Specifying a body font size of 100% or 1em seems to allow the most scalability - up and down - and allows the user to start by viewing in their preferred font size.
Finally... loose the 4.0 Transitional doctype. The transition started 8 or 9 years ago. It should be finished by now. Certainly shouldn't be used for new pages.
4.01 Strict doctype and CSS will give you the most accessibility for the most devices that support a browser - including phones and pda's.