Is the set session value behavior on the treatment_detail.php?
I would need to see a copy of this page to be able to see what may be wrong.
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.