So, I choose to unpublish the plug in and use another "FB Like Button".
If you want to make simple e-shop, I recommend JShopping.
Please improve shipping method. Make it more flexible when the cost is based on distance (city) and per weight.
After all, only one word for JShopping Cart: Wow!
But, when the time run, I found some problem:
1. This counter still count bot and I have no option to count only real visitor.
2. If you link your site with facebook API, it will be count 2 different visitor (you and facebook). If you add twitter API, it will be 3 visitor at same time.
3. After my site count more than 8.000 visitor, first page look ok. But, when you click any link in my site, it appear blank. When I test to turn of module one by one, I found the problem is this visitor counter.
So, I choose to uninstall this module from my site now.