It seems that the session variable is not getting set sometimes. I'm not sure why it would behave inconsistently like this. I have created a ticket for this issue, please login to WebAssist.com and visit your support history to update the ticket.
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.