[iamchenxin]

thanks.

yes , i did restart .

but why "update your kindle" is disabled? if restart can update. the "update your kindle" should not disabled.

and why the bin is disappear?
i copy the bin to kindle. but when i disconnect kindle,then connect it to computer again. the bin is disappear. and "update your kindle" is disabled.

i try this many times.
then i think maybe something wrong with filesystem. maybe kindle need reboot. so i reboot it.