Your update server behavior has the data type for the date field set to be number. Set it to date and the formatting should be done properly to allow the insert and updates to take place.
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.