/bin/snes -rom /usr/share/games/CLV-U-XFJBY/Rock_N__Roll_Racing.smc this command it not correct, when using the command in telnet the core says it's need a content file...
Look at your prompt...
try it without -Rom
/bin/snes /usr/share/games/CLV-U-XFJBY/Rock_N__Roll_Racing.smc - should run