Sorry, I don't use/know Dreamweaver. I code all my HTML, CSS, and JavaScript in a text editor. Note that the term "layer" refers to an older, proprietary Netscape-only tag/element. There is no such thing as a layer in standard HTML. I recommend you get in the habit of referring to elements by their proper names. We're dealing with DIV elements, not layers.

That aside, yes, the approach I'd take is to delete all CSS and styles until you get to the bare minimum. Then, build back up as needed.