Found Problem!
Can't update from DSi 1.4.1 U (Use file ak2ifw_update_3ds21_DSi143.nds)
CHIP ID: 0fc2 HW:8181 ..........
I can't press "START" or "any other keys" -> stop at -> Update is canceled, reboot DS
Already update to 1.4.2 (ak2ifw_update_3ds_v2_DSi.nds) Chessmaster
Can't update from DSi 1.4.1 U (Use file ak2ifw_update_3ds21_DSi143.nds)
CHIP ID: 0fc2 HW:8181 ..........
I can't press "START" or "any other keys" -> stop at -> Update is canceled, reboot DS
Already update to 1.4.2 (ak2ifw_update_3ds_v2_DSi.nds) Chessmaster