the eCart include code is using the virtual function:
//WA eCart Include
This is a problem with your Dreamweaver Site definition settings.
i the site definition there is a settings for "Create Links Relative to". When you use the Site option DW Will use the virtual funciton for include files. the virtual function is not supported in many versions of PHP. If you use the Document setting, DW Will use the require_once function for include file which is more widely supported.