Why can't I access the modem page?

Hello,

I have a Beetel 450 TC1 is a WiFi Modem and I have bsnl internet connected to my laptop through WIFI. Now today I changed a the access control listing and that is I added a access control listing with rules that say index:3 active:yes Application:ALL and Interface Both.
Now I am not able to access the home page of the modem through its url 192.168.1.1.

Is there anyway I can access the Access control setup and undo the setting change that I have done.

NOTE:
Internet is working fine as usual