Named: max open files (7030) is smaller than max sockets (21000)

Hello,
When I restart ISC Bind I get this messagenamed[95122]: max open files (7030) is smaller than max sockets (21000)
I know that this 7030 comes from the kernel settings
However, I thought that changing values in /etc/login.conf would help
named:\
        :openfiles=20009:\
        :openfiles-max=15024:\
        :tc=daemon:
I chose random values to be able to match them easily
So it seems that these values are not taken into account. Do you know why ?
Regards