NX_CALLer_Error while using NX_ip_raw_packet_Send

Hi,

While using nx_ip_raw_packet_Send  i am getting error 17 (0x11) which says in documentation invalid caller of this service.

What does that mean? in the thread i have a DHCP server, two packet pools and one ip instance. i am sending a packet which is basically a TCP packet starting with destination port and source port.

    status = nx_ip_raw_packet_send(&g_ip0,packet_ptr,dest_ip,NX_IP_NORMAL);

What causes this error?

Thanks