Accessing gateway settings on Arris TG1682P modem/router for NOW internet

Hi, 

I am having difficulty accessing the gateway settings on my Arris TG1682P modem/router for NOW internet. I am trying to put the modem/router in bridge mode so that I can setup a tp-link deco mesh wifi system. When I try to log into the gateway settings via http://10.0.0.1 it keeps telling me incorrect password. I am using the default login credentials- admin/password. I’ve tried resetting the modem, but it continues to reject the login credentials. Any help would be greatly appreciated! Thanks!! 🙏