It looks like you uploaded an older version of: WA_eCart/eCart1_PHP.php that I had updated in a previous post. Please download that file. I've fixed it again.
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.