Your DNS servers are supposed to point to bravenet if your domain is hosted here

so you need to change it if you are going to get your site up and going

In looking up your site it shows your DNS servers are pointed at bravenet but why your site is not working not sure so you need to open a support ticket

so not sure if you have purchased this domain or what here yet but you need to get all your information correct and more

the ip is changed via your ISP, so that is where you would have to get some information from. i don't know of any programs that will automatically sense your ip number and configure automatically. finding the ip is easy enough (as you probably know as you do it daily) but the configuration part is up to you.

might be a lot easier to sign up for free/paid hosting with bravenet.