what method are you using for the previews, i remember a while back we discovered that using one method for the preview didn't work, but another method did, i don't recall the exact details, but this sounds familiar
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.