Network Component Version 7.3

Hi
I can run the HTTP Server from Network version 6.6 and it's working fine

here is the code for version 6.6

int main (void) {
        osKernelInitialize ();                    // initialize CMSIS-RTOS
        // initialize peripherals here

        osKernelStart ();                         // start thread execution

        net_initialize();


        while(1)
        {

            net_main ();
            osThreadYield ();

        }
}

the problem is that when I switch to version 7.3 the network component does not work

here is the code for version 7.3

int main (void) {
        osKernelInitialize ();                    // initialize CMSIS-RTOS
        // initialize peripherals here

        osKernelStart ();                         // start thread execution

        netInitialize ();


        while(1)
        {

          osThreadYield ();

        }
}

Am I missing something?