i have comcast, and i have aquired a second digital cable box from a friend. its a GI and all my channels are fucked up. ie mtv is now a second station of tbs movie channels say "this channel should be avail shortly" but are not. and in the guide it doesn't give channel or tv show info(just has channel # and to be announced). my question, is there a reset i can do? or can i just not use this box?