What version of the extension do you have installed? Unfortunately we don't support CS5 anymore. Do you have a more recent version of Dreamweaver you can try with?
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.