It has something to do with v098 not recognizing my cx4.rom file. I don't know why it has this issue, when I could run the game fine with v094. I tried renaming cx4.rom to cx4.data.rom, since the prompt window specified that it was looking for that, and then a window popped up upon import, saying it imported the ROM successfully... but when I try to play the game, nothing happens. It shows a framerate counter, as if a game were running, but there's no sound or image (aside from all black). wat is happening???
Maybe the latest version broke something? This page notes that Rockman X2 and X3 are handled differently in v097, so that may have something to do with that. A google search doesn't turn up anything else, but in the meantime, I'd try rolling back to a version you know works.