Creating a trust between 2 Win2K Domains

I have built a DC and it’s domain is domainsecure. I have resently built another DC for the domain intranet.domain.com. I have tried to establish a trust between the two but can’t do it. I have set up DNS on the later described domain and I have used the netdiag tool to test it and it’s fine. When I begin to use the DNS Server on the intranet.domain.com domain as the DNS for the domainsecure domain, I have internet access but when I run netdiag, I get that my domain controller records aren’t in the DNS database. I can ping either network by NETBIOS name or IP but I just don’t know what records to put into the DNS for the two domains to coexist. I need some help as this is the first time I have ever done this. What needs to be done?Any help would be very great. Thanks in advance, Jeremy