you have some conflicting extensions installed.
the only extensions thjat should be installed are:
i sugest uninstalling all extensions, then re installing useing the order listed above.
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.