wiikey fusion update, unable to read the disc

i installed chip on my wii and tryed my original games work perfectly. now when i try update wiikey fusion 1.5 from sd card theres no gamecube logo on disc channel. when i go disc channel then it loads a few sec and then says unable to read the disc

any solution ?

EDIT: theres no softmod installed and wii version is 4.3E

For some people, you would have to power down the wii before taking out the SD card.

If you no longer see the gamecube icon, you can press the reset button a few times and it will show up. If it still doesn't show up you will have to disconnect the power cord from wii before inserting the SD card, then power it back on from a cold boot.