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Ping Not working

Dear all
I have made a custom board based on stm32f407IGT6 and used the same schematics from keil MBCSTM32F400 board, I have written this simple program for testing PING,

int main(void)
{
         SysTick_Config(SystemCoreClock/100);      /* Generate interrupt each 10 ms  */
         init_TcpNet ();


        while(1)
        {
                main_TcpNet();
        }
}

void SysTick_Handler (void)
{

    timer_tick ();
}

Also I have made this change into Net_Config.c file

#define TICK_INTERVAL  10

my PC does show that it has found some activity on the lan and the link leds will light up and for a bout 1 minute the yellow led will blink too, but the board does not respond with the ping,

here are the content of ST802RT1A registers,

PHY_REG_CNTRL=0x00001000;
PHY_REG_STATS=0x0000786D;
PHY_REG_PHYID1=0x00000203;
PHY_REG_PHYID2=0x00008461;
PHY_REG_LDADV=0x000005E1;
PHY_REG_LPADV=0x0000C1E1;
PHY_REG_ANEGX=0x0000000F;
PHY_REG_LDNPG=0x00002801;
PHY_REG_LPNPG=0x00000000;
PHY_REG_XCNTL=0x00001000;
PHY_REG_XSTAT=0x00000300;
PHY_REG_XRCNT=0x00000100;
PHY_REG_XCCNT=0x000011D8;
PHY_REG_XDCNT=0x0000000A;
PHY_REG_AUXCS=0x0000002B;
PHY_REG_AUXSS=0x0000F53E;
PHY_REG_AUXM2=0x0000000A;
PHY_REG_TSTAT=0x0000082B;
PHY_REG_AMPHY=0x000080E0;
PHY_REG_RN1F=0x00000000;
PHY_REG_RS1B=0x0000000A;

Do you know what's going wrong?