Website is not working using just the domain name

I am registered and paid for the domain name www.jagersonart.com.  I have built and published the website, but the only way to get the site to come up is to use the www.jagersonart.homestead.com. How can I get the .homestead.com off the domain name so that it works with just www.jagersonart.com.  This is strange, because the site was working properly just a couple of months ago.