Help me! UDP payload inserter problem,urgent!

I've added a UDP payload inserter and padding from the famous project- Offload example.

I can send a short message through SDRAM->mux with packets from SGDMA component (TS Multiplexer) input4> TSE MAC. So there are no probelm with the TSE. I want to send udp payload through :

prbs generator-> udp payload inserter -> padding -> mux with packets from SGDMA component (TS Multiplexer) -> TSE MAC. But there are no anything on the port.

the code to start the stream is as follows :

int main()

{

int i;

UDP_INS_STATS *insert_stat;

UDP_INS_STATS *getinsert_stat;

insert_stat->mac_dst_hi = lwip_htonl(0x001AA02A);

insert_stat->mac_dst_lo = lwip_htons(0xACF0);

insert_stat->mac_src_hi = lwip_htonl(0x00112233);

insert_stat->mac_src_lo = lwip_htons(0x4455);

insert_stat->ip_src = lwip_htonl(0xC0A80064);

insert_stat->ip_dst = lwip_htonl(0xC0A80065);

insert_stat->udp_src = lwip_htons(0x07D0);//port:

insert_stat->udp_dst = lwip_htons(0x07D0);

start_packet_generator(GENERATOR_0_BASE, 1472, 0x33557799)

printf("start_packet_generator\n");

start_udp_payload_inserter(UDP_INSERTER_0_BASE, &insert_stat

printf("start udp payload inserter %d times \n",i);

usleep(10000);

return 0;

}

Can anybody tell me the way to solve the probelms.Thank you a lot, give my best wishes to you.what 's problem,