Emulator

I finished disc 1 of Tales of Symphonia and when it goes to the screen to change discs, I know that I am supposed to go to File > Change Disc, that much is obvious. But when I try to load the iso for disc 2, the game screen first says "Checking game disc..." And then says "Please insert the Tales of Symphonia Disc 2" No matter how many times I try to load the iso it does the same thing.

I'm playing it on Dolphin 3.0 64bit on a Windows 7 laptop. The disc 1 iso works perfect, but it just won't recognize the second one for some reason?