Sending notification every 100msec in s130

[Anna]

Hi, i am trying to send my notify characteristic every 100 msec, i am using timer for this and when i am connecting to the nrf app, my nordic device is sending the data but after 25-30 sec it is stop transmitting data and disconnect with the "Error8:GATT CONN TIMEOUT". I tried to use the BLE_EVT_TX_COMPLETE event but it still the same. Here some parts of my code:

static void timer_timeout_handler(void * p_context)
{
	uint32_t err_code;
	if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
	{
		if(*flag == 1)
		{
			err_code = char_update(&m_service,(uint8_t *)&acc);
			if(err_code == BLE_ERROR_NO_TX_PACKETS)
			{
				*flag = 0;
			}
		}
	}
}

uint32_t char_update(ble_os_t *p_service, uint8_t *data)
{
	ble_gatts_hvx_params_t params;    
	memset(&params, 0, sizeof(params));
	params.type = BLE_GATT_HVX_NOTIFICATION;
	params.handle = p_seebo->characteristics[seebo_char].char_handle.value_handle;
	params.type   = BLE_GATT_HVX_NOTIFICATION;
	params.offset = 0;
	params.p_len = &length;	
	params.p_data = data;
	sd_ble_gatts_hvx(p_seebo->conn_handle, &params);
}


static void on_ble_evt(ble_evt_t * p_ble_evt)
{
	uint32_t err_code;

	switch (p_ble_evt->header.evt_id)
	{
		.
		.
		.
		case BLE_EVT_TX_COMPLETE:	
			*flag = 1;
		break;
		default:
			// No implementation needed.
			break;
	}
}

Can you please advise me what to do. Thank you.

[Anna]

The problem is there is no disconnected event at all, the app is disconnected and the device still think that it is connected, so i do not get the disconnected event. I've noticed it's disconnected randomly and have nothing to have with the transmitting.