Websites at Homstead not opening through Domain Names at Namesecure.com

My websites at Homestead are supposed to be connected to their various domain names by  Nameseure.com - none of my websites are coming up on my computer, I have not checked on another computer, I have however tried to pull up one of them, brokenrailfarm.com (brfnew.homestead.com) and it does not come up- what is the problem?  Thanks for any help you can give me.