I'd search the page for "CSSMenuWriter" and remove any section of code that refers to it. If you have difficulty, you can send me ftp access and a url to view the page live and I can remove it for you.
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.