cannot define table guardian: Cannot allocate memory

[ChOcO Bn]

i'm using freebsd 5.3 with pf and altq compiled in kernel.
i'm trying to fill a table with a file containing some range of ips (
according to CIDR norms )

choco ~/ip_guardian# cat guarding.ip | wc -l
   46916


and when i try to reload my rules, it can't work : 

"cannot define table guardian: Cannot allocate memory"

How could i handle this ?