problems while inserting hooks using Netfilter framework

Hi all,
I am trying to insert my hooks through a loadable module with the help
of netfilter frame work.

the structure looks like this :

static struct nf_hooks_ops ip_in_ops

={ { NULL,NULL } ,test_func, PF_INET,NF_IP_LOCAL_IN,INT_MIN }

but my function is not getting called . I tried both way : enabling
/disabling iptables .
Can anybody suggest me what may be going wrong.

Regards,
TellMeMore

Oh got it i made mistake while initializing this structure with 2.6
kerenl