Wi/Fi is unaccessable after hook up with Comcast

Modem is CG3000D

I had set up the modem / router before activating with Comcast.

I logged in to it with http://192.168.0.1, use admin and password to log in,

changed password for log in.

set wireless speed to what i wanted.

named wireless network.

set up new password for wireless network.

tested wireless network before activating with Comcast.

After activating with Comcast, lost access to wireless on modem / router. 

Cannot log into router now with http://192.168.0.1, just get an error.

short of resetting router, any suggestions??

i haven't bean able to find correct connection link