Please explain a little about what you are doing when you get these errors and the steps you are taking before this. Have you tried to manually submit any site maps that you have generated?
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.