On the program I went to auto detect and it tell me then it has no communication with the scanner I know with my bc8 I need to put it in remote not sure if the 15 has something like that
One reason that ARC15 can't auto detect the scanner might be that the scanner ports are not set up, as I wrote earlier. Did you read the Easier to Read manual? Like I mentioned, you need to configure the ports on the scanner before the PC will connect.