9.2.0 cache cleaner: dns_dbiterator_first() failed: out of memory

[vulcankim]

Hello All,

-bind version : 9.2.0
- HPUX B.11.00 U 9000/800
- glance command output
  Total VM :  44.9mb   Sys Mem  :  50.8mb   User Mem: 247.2mb   Phys
Mem: 640.0mb
  Active VM:  25.1mb   Buf Cache: 128.0mb   Free Mem: 213.9mb

- named error messages
Nov 13 12:23:15.300 database: warning: cache cleaner could not create
iterator: out of memory
Nov 13 12:23:15.300 general: error:
/ux/core/inet/src/bind.src/bind-9/bind-9.2.0/lib/dns/cache.c:590:
unexpected error:
Nov 13 12:23:15.300 general:s error: cache cleaner:
dns_dbiterator_first() failed: out of memory

so, I putted in my named.conf

  datasize 128M

and i restarted named deamon but following message show
- general: warning: set maximum data size to 134217728: invalid file

what can i do?