Would it be possible for you to post back and include the page in question and the form builder include files so that we can check it out. I think this would be the quickest way to resolve the css issues.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.