Sometimes the bundled Moonshell is locked to the card.
I'm not sure what the Galaxy Eagle i is (I'm guessing it's the one I've seen referred to as 'GEi', the R4 Ultra clone which is an Acekard clone.), so I don't know what to tell you beyond that.
Do you press a button to run Moonshell like the 'classic' R4 menu (three icons: Files | Media | Slot-2), if so you might be able to run it from the file browser and not a 'Media' replacement.
Alternatively if you ARE running it from the Media button, make sure you're replacing the file that launches Media with Moonshl2.nds. On official R4's it's called "_DS_MSHL.NDS"