The code is installed fine but it's not counting any visitors for some reason.
If the code is installed fine it may just be that no new visitors have come to your site yet.
Did you configure StatCounter counter to block your visits with a cookie, or to block them based on your IP address?
Try to get a friend to visit your website, and see if they get recorded.
Answers to the majority of questions we receive can be found here in the knowledge base.