wAP dropping connection

I have little problem regarding WAP ad dropping connection. wAP is connected to ISP’s router and it is configured as AP and it is working OK for most part of time. Problem is that few times a day it is dropping connection and I have to refresh page to get it, so it get’s annoying. Thing is getting frequently, so everybody at home is getting frustrated by the drops.
Do you have ide-a what could it ibe, or I have to reconfigure it from the start?

What’s the ROS version?

What’s in System > Routerboard, can you post a screenshot?

It is 6.39.1 (stable)

anyone?

Firmware is not up to date, note Upgrade Firmware = 3.36 while Current Firmware=3.26.

To upgrade:

1.- Click on Log.

2.- Go to System > Routerboard and click the Upgrade button.

Watch out log, when you see a message stating upgrade was successful, reboot the router.