FTP server migration

I have old and new ftp servers, both have different computer and domain names...
I connected the old and new ftp servers using crossover cable, configured the hosts file, and I was able to ping the new server from the old by computer name but not from the old to the new. I am trying to create trust between the two...This is the method I used to migrate other servers. Is there anything that I missed to make this two servers to communicate or is there any other workaround to migrate AD info to the new server?

Thank you for your help.