SnezziDS will not run on any slot-1 devices, or any device that doesn't have GBA support. Try SNES DS or SNEmulDS instead. I have no idea about NesterDS though.
Just on a side note, if a piece of homebrew doesn't boot right, you can try renaming the *.ds.gba version of it to *.nds and running that. You can also try booting it through Moonshell. I'm not sure if these tactics help with the SC One device, but they work well on slot-2 Supercards.