It looks like it would work.
Try adding some debug code after line 202 like:
That is the SQL statement running and it might explain why all rows are updated.
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.