mesh internal watchdog timer enabling issue

Hi,

    Right now i am working on mesh sdk 3.0.0 on segger embedded studio and board i am using nrf52832. In my application i am trying to implement the watchdog timer but it's not working means the functions that i initialized and allocating are returning  NRF_SUCESS but the watchdog timer is not working , even if i am not feeding it, the device is not restarting.

#include "nrf_drv_wdt.h"

nrf_drv_wdt_channel_id m_channel_id;

/*Watchdog timer initialization*/
nrf_drv_wdt_config_t config = NRF_DRV_WDT_DEAFULT_CONFIG;

err_code = nrf_drv_wdt_init(&config, wdt_event_handler);
__LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "err_code1:%d\n",err_code);
err_code = nrf_drv_wdt_channel_alloc(&m_channel_id);
__LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "err_code2:%d\n",err_code);

the handler is

void wdt_event_handler(void)
{
hal_led_mask_set(LEDS_MASK, LED_MASK_STATE_OFF);
//NOTE: The max amount of time we can spend in WDT interrupt is two cycles of 32768[Hz] clock - after that, reset occurs
}

The above code which is used in my application and in sdf_config.h file i enabled there instances

// <e> NRFX_WDT_ENABLED - nrfx_wdt - WDT peripheral driver
//==========================================================
#ifndef NRFX_WDT_ENABLED
#define NRFX_WDT_ENABLED 1
#endif
// <o> NRFX_WDT_CONFIG_BEHAVIOUR - WDT behavior in CPU SLEEP or HALT mode

// <1=> Run in SLEEP, Pause in HALT
// <8=> Pause in SLEEP, Run in HALT
// <9=> Run in SLEEP and HALT
// <0=> Pause in SLEEP and HALT

#ifndef NRFX_WDT_CONFIG_BEHAVIOUR
#define NRFX_WDT_CONFIG_BEHAVIOUR 9
#endif

// <o> NRFX_WDT_CONFIG_RELOAD_VALUE - Reload value <15-4294967295>


#ifndef NRFX_WDT_CONFIG_RELOAD_VALUE
#define NRFX_WDT_CONFIG_RELOAD_VALUE 5000
#endif

// <o> NRFX_WDT_CONFIG_IRQ_PRIORITY - Interrupt priority

// <0=> 0 (highest)
// <1=> 1
// <2=> 2
// <3=> 3
// <4=> 4
// <5=> 5
// <6=> 6
// <7=> 7

#ifndef NRFX_WDT_CONFIG_IRQ_PRIORITY
#define NRFX_WDT_CONFIG_IRQ_PRIORITY 6
#endif

// <e> WDT_ENABLED - nrf_drv_wdt - WDT peripheral driver - legacy layer
//==========================================================
#ifndef WDT_ENABLED
#define WDT_ENABLED 1
#endif
// <o> WDT_CONFIG_BEHAVIOUR - WDT behavior in CPU SLEEP or HALT mode

// <1=> Run in SLEEP, Pause in HALT
// <8=> Pause in SLEEP, Run in HALT
// <9=> Run in SLEEP and HALT
// <0=> Pause in SLEEP and HALT

#ifndef WDT_CONFIG_BEHAVIOUR
#define WDT_CONFIG_BEHAVIOUR 9
#endif

// <o> WDT_CONFIG_RELOAD_VALUE - Reload value <15-4294967295>


#ifndef WDT_CONFIG_RELOAD_VALUE
#define WDT_CONFIG_RELOAD_VALUE 5000
#endif

// <o> WDT_CONFIG_IRQ_PRIORITY - Interrupt priority


// <i> Priorities 0,2 (nRF51) and 0,1,4,5 (nRF52) are reserved for SoftDevice
// <0=> 0 (highest)
// <1=> 1
// <2=> 2
// <3=> 3
// <4=> 4
// <5=> 5
// <6=> 6
// <7=> 7

#ifndef WDT_CONFIG_IRQ_PRIORITY
#define WDT_CONFIG_IRQ_PRIORITY 6
#endif

 the same application and the watchdog enabling i done in my sdk 15.0 without mesh in keil and there its is working properly.

please help me out how to use internal watchdog in mesh

Thanks in advance

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