BX-02BLODIA

Can anyone help me with running CV1000 games in general? I'm using Mame64 0.219 and all the games i've tried give me a missing ROM/CHD error when the names of the files are as they should be and the u2,u4,u23,u24 files in the zips are all present. EDIT: used 0.198 instead and it worked for some reason, even though it seems that romsets for these games remain the same for both versions. Getting that Checksum error for SDOJ though.