NRF52 ESB RX-TX

how to change RX and TX operations ? i wrote next code:

#include "nrf_esb.h"
#include <stdbool.h>
#include <stdint.h>
#include "sdk_common.h"
#include "nrf.h"
#include "nrf_esb_error_codes.h"
#include "nrf_delay.h"
#include "nrf_gpio.h"
#include "nrf_error.h"
#include "nrf_log.h"
#include "boards.h"
#include "nrf_log.h"

#define RX 0 
#define TX 1 

uint8_t RX_MODE_FLAG = 0;
uint8_t TX_MODE_FLAG = 0;

const uint8_t leds_list[LEDS_NUMBER] = LEDS_LIST;
uint8_t led_nr;

nrf_esb_payload_t 				rx_payload;
nrf_esb_payload_t        	tx_payload = NRF_ESB_CREATE_PAYLOAD(0, 0xC1, 0x00, 0x05);

void nrf_esb_error_handler(uint32_t err_code, uint32_t line)
{
    NRF_LOG_PRINTF("App failed at line %d with error code: 0x%08x\r\n",
                   line, err_code);
#if DEBUG 
    while(true);
#else
    NVIC_SystemReset();
#endif
}

#define APP_ERROR_CHECK(err_code) if(err_code) nrf_esb_error_handler(err_code, __LINE__);

void nrf_esb_event_handler(nrf_esb_evt_t const * p_event)
{
    switch (p_event->evt_id)
    {
        case NRF_ESB_EVENT_TX_SUCCESS:
            NRF_LOG("TX SUCCESS EVENT\r\n");
				    // Toggle one of the LEDs.
						nrf_gpio_pin_toggle(LED_2);
            break;
        case NRF_ESB_EVENT_TX_FAILED:
            NRF_LOG("TX FAILED EVENT\r\n");
						nrf_gpio_pin_toggle(LED_3);
						nrf_esb_flush_tx();
            break;
        case NRF_ESB_EVENT_RX_RECEIVED:
            NRF_LOG("RX RECEIVED EVENT\r\n");
            if (nrf_esb_read_rx_payload(&rx_payload) == NRF_SUCCESS)
            {
							// Set LEDs identical to the ones on the PTX.
							nrf_gpio_pin_toggle(LED_4);
            }
						nrf_esb_flush_rx();
						TX_MODE_FLAG = 1;
            break;
    }
		//NRF_GPIO->OUTCLR = 0xFUL << 12;
    //NRF_GPIO->OUTSET = (p_event->tx_attempts & 0x0F) << 12;
}

void clocks_start( void )
{
    NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
    NRF_CLOCK->TASKS_HFCLKSTART = 1;
    while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0);
}

void gpio_init( void )
{
    LEDS_CONFIGURE(LEDS_MASK);
}

uint32_t esb_init( uint8_t state )
{
    uint32_t err_code;
    uint8_t base_addr_0[4] = {0xE7, 0xE7, 0xE7, 0xE7};
    uint8_t base_addr_1[4] = {0xC2, 0xC2, 0xC2, 0xC2};
    uint8_t addr_prefix[8] = {0xE7, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8 };
			
    nrf_esb_config_t nrf_esb_config         = NRF_ESB_DEFAULT_CONFIG;
    nrf_esb_config.payload_length           = 32;
		nrf_esb_config.retransmit_delay         = 1000;
		nrf_esb_config.retransmit_count					= 2;
    nrf_esb_config.protocol                 = NRF_ESB_PROTOCOL_ESB;
    nrf_esb_config.bitrate                  = NRF_ESB_BITRATE_2MBPS;
		switch(state){
			case RX:
						nrf_esb_config.mode                     = NRF_ESB_MODE_PRX;
			break;
			case TX:
						nrf_esb_config.mode                     = NRF_ESB_MODE_PTX;
			break;	
		}
    nrf_esb_config.event_handler            = nrf_esb_event_handler;
		nrf_esb_config.crc											= NRF_ESB_CRC_16BIT;	
    nrf_esb_config.selective_auto_ack       = true;
		
		err_code = nrf_esb_set_rf_channel(14);
		VERIFY_SUCCESS(err_code);
		
    err_code = nrf_esb_init(&nrf_esb_config);
    VERIFY_SUCCESS(err_code);

    err_code = nrf_esb_set_base_address_0(base_addr_0);
    VERIFY_SUCCESS(err_code);

    err_code = nrf_esb_set_base_address_1(base_addr_1);
    VERIFY_SUCCESS(err_code);

    err_code = nrf_esb_set_prefixes(addr_prefix, 8);
    VERIFY_SUCCESS(err_code);

    return err_code;
}

int main(void)
{
    uint32_t err_code;

    gpio_init();

    err_code = NRF_LOG_INIT();
    APP_ERROR_CHECK(err_code);

    clocks_start();

    err_code = esb_init(RX);
    APP_ERROR_CHECK(err_code);

    NRF_LOG("Enhanced ShockBurst Receiver Example running.\r\n");
	
	  err_code = nrf_esb_start_rx();
    APP_ERROR_CHECK(err_code);
    while (true)
    {
			
			if(TX_MODE_FLAG)
			{
				//err_code = nrf_esb_stop_rx();
				err_code = esb_init(TX);
				
			  tx_payload.length = 32;
				tx_payload.pipe = 0;
				tx_payload.noack = true;
				tx_payload.data[1]++;
				
				err_code = nrf_esb_start_tx();
        if (nrf_esb_write_payload(&tx_payload) == NRF_SUCCESS)
        {
						nrf_gpio_pin_toggle(LED_1);	
				}	
				
				TX_MODE_FLAG = 0;
				err_code = esb_init(RX);
				err_code = nrf_esb_start_rx();
			}
        __WFE();
    }
}

Recieve is working nice. But there is TX error event. And after 4th time tx stopted.