add on domain redirects to primary domain

Im hosted by hostgator, and added my addon domain ftp info from my cpanel over to filezilla. Than I upload wordpress files over to my addon domain folder. Everything seemed to go fine, i followed all the instructions from hostgator, filezilla, wordpress….but when I got to browser and enter my site-addondomain.com I get redirected to my primarydomain.com site. Even when I go to addondomain.com/wp-admin, I get primary domain admin, instead. Is there somewhere I went wrong?