AROS 68k has two ROM files, a Kickstart and a Kickstart ext, you will need both (i forget the e-UAE options to load that). The emulator should be set up exactly as an A1200 with 4meg fast ram and if possible RTG. It should work then, IIRC AROS doesn't show a disk prompt you should ensure a bootable disk (hard or floppy) is available)
Note: re the 512k 1.3 ROM, I had to double up my ROM image to make DOS UAE work many years ago... I guess any that are floating around probably still are doubled up
