can you post your log content?
on your SD card you should have a log file created by the installer, it contains some info (what it does, what it found, etc.)
maybe it could help.
I don't know how to do spoilers on this board but here is the log:
HackMii v1.2 installer starting up
PVR = 00087200
running under IOS 58 rev 0x1920
42 titles are installed
Found IOS 62: revision: 0x1b1e.
Found IOS 59: revision: 0x2421.
Found IOS 58: revision: 0x1920.
Found IOS 57: revision: 0x181f.
Found IOS 56: revision: 0x171e.
Found IOS 55: revision: 0x171f.
Found IOS 53: revision: 0x171f.
Found IOS 48: revision: 0x111c.
Found IOS 46: revision: 0xf17.
Found IOS 45: revision: 0xf17.
Found IOS 43: revision: 0xf17.
Found IOS 41: revision: 0xf17.
Found IOS 38: revision: 0x111c.
Found IOS 37: revision: 0x171f.
Found IOS 36: revision: 0xf18.
Found IOS 35: revision: 0xf18.
Found IOS 34: revision: 0xf18.
Found IOS 33: revision: 0xf18.
Found IOS 31: revision: 0xf18.
Found IOS 28: revision: 0x80f.
Found IOS 22: revision: 0x60e.
Found IOS 21: revision: 0x50f.
Found IOS 17: revision: 0x508.
Found IOS 15: revision: 0x508.
Found IOS 14: revision: 0x508.
Found IOS 13: revision: 0x508.
Found IOS 12: revision: 0x30e.
Found IOS 9: revision: 0x50a.
Found IOS 2: revision: 0x261.
Found IOS 80: revision: 0x1c20.
launching IOS 58 for the installer...
IOS launched...
IOS versions: Installer: 58, HBC: 0
starting preparations
device id: NG24ed21ea
Waiting for mini to load ...
Mini version: 1.3
NAND minpage: 0x200
set NAND minpage to 0x40
Calling boot2_run(1, 58)
Waiting for boot2 to load ...
Waiting for IOS ...
IOS loaded: IOS58 v25.32
IPC started (634)
boot2_parse_blocks: examining existing boot2 layout
boot2 block 0:
00000000 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000010 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000030 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000040 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000050 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000060 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000070 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
boot2 block 1:
00000000 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000010 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000030 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000040 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000050 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000060 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000070 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
boot2 block 2:
00000000 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000010 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000030 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000040 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000050 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000060 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000070 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
boot2 block 3:
00000000 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000010 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000030 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000040 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000050 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000060 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000070 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
boot2 block 4:
00000000 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000010 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000030 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000040 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000050 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000060 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000070 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
boot2 block 5:
00000000 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000010 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000030 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000040 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000050 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000060 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000070 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
boot2 block 6:
00000000 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000010 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000030 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000040 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000050 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000060 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
00000070 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
parsing last generation bootmap
parse_blocks: found 0 valid blockmaps
found 0 valid blockmaps
invalid mapcount (0)
prepare_bootmii: boot2_parse_blocks failed: -1010000000
preparations done!