Cant access 192.168.100.1

[scr1b3]

I have a Netgear Stealth cable modem and it too stopped working about a week ago. I also bought this pre-chip with I believe the latest haxorware version (39). I can access 192.168.100.1 though I do not have the login and the person I bought it from has not return any of my calls. Just wondering of there is standard login such as (username: admin pw: blank). I tried that but it doesn't work.

Thanks !