kill -HUP `cat /etc/named.pid` does not reload name server

[LaConte, Rachel]

I have upgraded bind from 8.2.2p5 to 9.1.0.  I tried using, kill -HUP `cat
/var/named/named.pid`, and it does not work anymore. Changes
that I have made to the zone files are not updated, when I use dig or
nslookup.