Multiple timers not working

Hi Dialog Team,

I am using 3 timers in my ble_app_peripheral project. Initially, I start a systick timer of duration 2ms, then in the callback of systick timer, I start a kernel timer by using the api app_easy_timer(), of 100ms. I continue calling this function, and upto this point the project works fine. Now, when I call another kernel timer of 5 seconds as follows, device execution stops abruptly. This is the code I am using :

systick_register_callback(handle_2ms_timer);

void abc (void)
{
.....
systick_start(2000,1);

}
void handle_2ms_timer(void)
{

systick_stop();

listen_interval = 50;
timer_listen_interval = app_easy_timer((listen_interval*10),handle_listen_interval_timer);
user_adv();

}

void user_adv()
{
struct gapm_start_advertise_cmd* cmd;
cmd = app_easy_gap_non_connectable_advertise_get_active();

set_parser_data();

set_beacon_data(cmd);

app_easy_gap_non_connectable_advertise_start();
timer_adv_interval = app_easy_timer((adv_interval*10),handle_adv_interval_timer);

}

The execution doesnt reach the callback handler of either kernel timers.
When just 2 timers, systick and adv_interval_timer are called, device functioning is fine. Problem starts when I am introducing a second kernel timer concurrently.

Thanks in advance,

wisilica