the session variable that eCart creates for the shipping country is named "eCartCheckoutForm_shipping_country"
your rule is using the session "shipping_country" which probably does not exist.
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.