Bind 9.2.3 run only single process

[Tanawat Konsombat]

Hello
       I'm using Slackware 9, Kernel 2.4.27 SMP, Bind 9.2.3 compile with 
option
              ./configure --sysconfdir=/etc --enable-libbind 
--enable-threads --prefix=/usr
       problem is named process didn't fork any child process and 
comsume 99% cpu.
       I'm using PE1750 dual Xeon 2.8GHz.

Please help

Thank you 
Tanawat Konsombat