Please send a screen shot of the Dreamweaver Extension manager showing the installed extensions and version numbers in a zip archive, it is most likely a problem with conflicting extensions.
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.