Mounting SD Card FAILED (-1)

Hi, i have installed the Homebrew channel and DVDx sucessfully but when i try install bootmii either as boot2 or ISO it always says
"Mounting SD card... FAILED (-1)

I have tried format the card to FAT but still same

I got virgin wii with 4.2e system and wiikey1 chip

Thanks for help

Your SD card may be unsupported. Try another one.

Quote
WikiFSX
Your SD card may be unsupported. Try another one.

Please note that just because your SD card is unsupported by "normal" applications (HBC, most homebrew, installer) doesn't mean it wont be supported by Bootmii.

can ne 1 tell me what 2 do 2 restore my bootmii i was in a hurry and deleted it from my console its givin me a (-1) error i have tried everything it dont even have bootmii option on the homebrew app now.some one help me or im gonna die a horrible death cause my WIFE is ganna KILL me

As the previous posters have already said:

Try another SD card.