Problem with firmware upgrade in LTE modul on MIKROTIK WAP

Problem description: Problem with firmware upgrade in LTE modul on MIKROTIK WAP 

I have problem with firmware upgrade in LTE modem on my Mikrotik. After update Router OS from 6.X version to RouterOS ver 7. I have problem to process LTE firmware upgrade. I use button UPGRADE FIRMWARE in LTE interface, but I does not work. Can you help me?

Problem solution: Problem with firmware upgrade in LTE modul on MIKROTIK WAP 

• Go to Winbox
• Click on NEW TERMINAL

1. Type: interface lte firmware-upgrade lte1    you will see if new firmware exists.
2. Type: interface lte firmware-upgrade lte1 upgrade=yes    you will see percentage of upgrade proccess - DONE when is finished
3. Go to menu SYSTEM - RouterBOARD - and click on USB Power Reset

Finished.