my tf300t is using 4.2.1, and bootloader is ww_epad-184.108.40.206.5
first i unlock the device, then i fastboot twrp v220.127.116.11 in it(I tried several versions, twrp or recovery, but all of those couldn't read internal memory or ext sd card. only this version is ok)
then i wipe data and made it factory reset
finally i choose cm11 to install, and then it told that error flashing zip
and now when i boot the device, it won't go to the android system but go to twrp by itself
what should i do now? should i root it before i install cm11?