Homebrew Help with GxGeo

[Zonta85]

I have a little problem with GxGeo. I downloaded a set made with the homebrew and some roms that works great. I tried to add a rom, Super Sidekicks 2, and i'm sure that the name of the rom (ssideki2.rc placed in the roms folder) is the same of the related rc file placed in the romrc folder (ssideki2.rc), but the game doesn't show up in the rom list.
What i'm doing wrong?