You need to set the Store URL and Checkout URL in the web-based admin to match your website's location online.

SET STORE URL

Login to the admin, click on Store Setup, and then Click : Store URL (Website Address) & Default Page Configuration
 
Enter the domain name or IP address where you installed the Site Store Pro files in the field labeled ‘Website URL’.

Do NOT include a trailing forward slash (/) when entering the URL of your store.

For example, if the Site Store Pro files were copied to http://www.123abc456.com/ you would enter http://www.123abc456.com/ 

If you copied the files to a subdirectory on your webserver, do not forget to include the subdirectory in the URL. For example, if you copied the files to a subdirectory called ‘teststore’ on the webserver located at 192.168.1.101, you would enter http://192.168.1.101/teststore as the Website URL.

SET CHECKOUT URL

Click on Store Setup, then click on the ‘Checkout URL, SSL Settings & Payment Provider Selection’ under the ‘Order Checkout Setup’ section :

The Checkout URL controls where the Site Store Pro application will look for the “Checkout “ AND “My Account” areas on your Site Store Pro enabled online store.

When the website is “live”,  the Checkout URL field will contain either your SSL URL  (https://...)  if you will be collecting credit card payment information OR it will be the same as your Store URL if you will be using PayPal or Google as your payment processor. (However, many Site Store Pro enabled sites use an SSL certificate even if they will not be collecting payment information to protect the My Account login information.) Note: Your webhost may include a “shared” SSL certificate which you can use as the checkout URL value.

When setting up your initial Site Store Pro installation or when testing the trial version, you may not have an SSL certificate available and/or may have installed the files into a subdirectory for testing.

In these situations, simply enter the same URL that was entered as the Store (Website) URL. The Checkout URL can be changed when you receive your SSL certificate and/or if the site is copied from a subdirectory to “live” status in the root folder.

To proceed with the Checkout URL setup, enter a URL in one of the following formats in the ‘Checkout And/Or Secure URL’ field:

• Standard SSL: (Example) https://www.123abc456.com/ 
• Shared SSL : (Example) https://www.myhost2234.com/123abc456
• Temporary Checkout URL: (Example) http://192.168.1.101/teststore