ignoring out-of-zone data???

[hakim soso]

Hi,
I'm using bind9 as root zone name server for domain ff (for example),
& when I put a domain eg:
aaa.ff IN NS aa.ll.com
       IN NS aa1.ll.com
aa.ll.com IN A x.y.z.c
aa1.ll.com IN A x.a.s.z

where x.y.z.c & x.a.s.z is the slave & master name servers for ff
domain

I get this error: dns_master_load db.ff:7 ignoring out-of-zone data
(aa.ll.com)
                  dns_master_load db.ff:7 ignoring out-of-zone data
(aa1.ll.com)
Any help????