If you are using the Website Builder which is provided with most website purchasing sites such as GoDaddy etc then here is how you install your tracking code.
Log in to your Website Builder account.
Click Design Your Pages.
If necessary, from the Page menu, select the page you want to modify.
Click Popular, and then drag and drop the Script icon over a Drop Zone. Drop Zones display on your Web pages when you hover over them.
Click Publish in the upper right.
Once you have placed the code, head back to your Whoisvisiting dashboard and click 'Check Code'.
Your account should now be active.