Justjson

Hey guys, I followed a tutorial from "The Atari Geek" on how to properly setup and install "Altirra." I downloaded roms that were confirmed to be working from "Atari Mania." However there are two that won't work. Am I missing something? Strip poker ends up with a loading error before I even see the main screen, and "The blade of of blackpoole" loads to the main screen and then states "Please insert your copy of the back side. Press a key when ready." I don't know what to do at that point so I just press a key and then nothing happens. Does anyone know what I'm doing wrong? Thanks in advance guys... -Jason