Amstrad cpc464+ on MESS

Hello,
I am trying to load this emulator in MESS v.121 but it keeps telling me that it requires an image to load. I have some chess roms for it and just put in the cpc464 bios rom.
I have no idea what it wants, please help.
Thanks,

I am trying to load this emulator in MESS v.121 but it keeps telling me that it requires an image to load. I have some chess roms for it and just put in the cpc464 bios rom.
I have no idea what it wants, please help.
Thanks,
