Was the active directory installtion "dcpromo" successful?
Do you already have active dirctory data (users, groups,...etc.), or is it a fresh installation ?
In W2K there is nothing (really) called BDC, all Domain controllers do (almost) the same rule.
If the active dirctory configuration or the DNS is missed-up, most propably you will not be able to install a second server as a domain controller that has a valid replica of the AD.
my advice is if you have fresh installtion of no AD data to worry about is start over. Remove active directory from the 1st server, (you don't propably need to format it !), then make sure the DNS server is working correctly.
If you already have AD data then
1- make sure the DNS is operational.
2- make sure your server is configured to use that DNS.
3- in the DNS make sure dynamic registration is enabled in the zone of your domain.
4- either use the command "ipconfig /registerdns" , or better restart the server
after that hopefully you will get the AD operational.