A couple of things - an IP is a number that represents your web space - A URL is the domain name for your site.
To move your shop from a sub directory to the root see: http://tutorials.zen-cart.com/index.php?article=122
Please do not PM for support issues: a private solution doesn't benefit the community.
Be careful with unsolicited advice via email or PM - Make sure the person you are talking to is a reliable source.
Just thought I would let you know that I have accessed both URL's from UK without any problem - I assume you have fixed things?