So, I've got an Ewin 2 Pro miniSD, which according to what I've read should work on the GBA, but I can't make it boot. It boots on the DS, both in GBA and DS mode but my GBA SP shows a screen with the old Gameboy logo (like a GB or GBC game is inserted) and instead of Nintendo at the bottom there is a black box. Now, I've never tried my GBA with GBA games, only with GB and GB, so I'm wondering, is it possible that it's broken and only the GB/GBC mode works? If I turn it on with no cart inserted then the regular GBA boot screen appears. Finally, I've read that since this Ewin is a Supercard clone I can use the SC firmware, and launching the update tells me that I have version 1.63 but when pressing A to update it says "Read flash id error! Please turn off. 2e00".