Help with changing name servers for a website

So I recently bought a domain. I know it takes a day or two to propogate or whatever, and then it comes online. It's been longer than that, so it is online and such, but I tried to change my name servers to the ones given to me in an email from wiredworldhosting.com, the website Bradley had a thread about a few days ago. But when I change the name severs, the website doesn't even load anymore and such so I'm not sure what to do...Can anyone help me a bit? Sorry, I'm new to this.

What's the domain?

Have you set up your account properly over at wiredworldhosting.com?

Are you using an external host? You bought the domain from him and plan to host the website somewhere else? You will need the Host's name servers. And also you can give Nick a call. (He runs the site) He'll help you do anything you need to do.

I bought the domain ompha.li off inwx.com. Don't ask about the name lol. Then, it gave me the domain obviously and control over it, but then I bought hosting on wired. I tried a few different options for changing the DNS an such but I can't seem to get them to wirk together :/