You're actually almost done if this is about the mycollegetips.org domain - login to the registrar and update the nameservers to ns1.x10hosting.com and ns2.x10hosting.com.
I ran a whois on that domain (since it's in your parked domains already) but the nameservers aren't set to ours, so anyone viewing it isn't actually being redirected to x10 to view it.