NDK/NSP-OMAPL138C6748: Send large packet using TCP with Network Developers Kit (NDK) And NDK Support Package (NSP)

I am using the network package ndk_evm6748_elf_helloWorld, 

The version of NDK: 2.25.1.11 and NSP: 1.10.3.15

SYSBIOS 6.46.4.53.

I took the code of the example TCP echo server from the document SPRU524J–May 2001 p.104 and modified as following:

#include <netmain.h>
#include "helloWorld.h"

#include <ti/sysbios/knl/Task.h>
//
// dtask_tcp_hello() - UDP Echo Server Daemon Function
// (SOCK_DGRAM, port 7)
//
// Returns "1" if socket 's' is still open, and "0" if its been closed
//
int dtask_tcp_echo( SOCKET s, UINT32 unused )
{
   struct timeval to;
   int I;
   char *pBuf;
   int i,j;

   HANDLE hBuffer;
   (void)unused;
   // Configure our socket timeout to be 5 seconds
   to.tv_sec = NULL;//5;
   to.tv_usec = 0; 
   setsockopt( s, SOL_SOCKET, SO_SNDTIMEO, &to, sizeof(to) );
   setsockopt( s, SOL_SOCKET, SO_RCVTIMEO, &to, sizeof(to) );
   I = 1;
   setsockopt( s, IPPROTO_TCP, TCP_NOOPT, &I, 4 );

   for(;;)
   {
      I = (int)recvnc( s, (void **)&pBuf, 0, &hBuffer );
      // If we read data, echo it back
      if(I > 0)
      {
         j=0;
         for(i=0;i<200;i++)
         {
            if(send( s, stringData+j, 1000, 0) < 0)
            {
               break;
            }
            j=j+1000;
           recvncfree( hBuffer );
         }

      }
      // If the connection got an error or disconnect, close
      else
         break;
   }

   fdClose( s );
   // Return "0" since we closed the socket
   return(0);
}

=========================================================================================

stringData[] is a char array have a size of 20000. I am expecting those 200000 bytes char will be sent out. However, I only got about 100000 bytes. I tried to suspend running in debug mode. It looks like the program goes to the Idle_run() before the for loop is done. Tried to set break point at "break" right after send(), never reached.Can you give me some suggestions?

Thanks,
Andy