Logging problem of Bind 8.1.2 on Solaris 8

[hongganghu]

Here is part of the named.conf file running Solaris 8 with Bind 8.1.2.

logging {
 channel my_syslog {
  syslog daemon;
  severity info;
 };
 channel my_file {
  file "/var/adm/dnsquery.msg" versions 5 size 20k;
  severity dynamic;
 };
 category statistics { my_syslog; my_file; };
 category queries { my_file; };
 category security { my_file; };
 category panic { my_file; };
};


However, I could not grep any dnsquery.msg file after restart named.  Any
suggestions on the syntax?

Any help or advice is greatly appreciated!!!!!