This error indicates a problem on the server with the session.save-path. if you bring this error to the attention of your host, they should be able to fix the issue very easily.
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.