DNS Zone transfers are not working Server 10.3

Not sure why, I have a master zone on server ns1 and a slave on ns2 with the master name server for the domain list on server 2. Have tried a records and ns records on ns1. These server are for internal dns, I just want a backup. Are there any gotcha's that I might be missing. What should i look for. Bind is 9.2.2 we have even rebuilt 2 servers from scratch after the first attempt failed. Any help would be appreciated. aone transfers are enabled thanks Bob