官方原版4.42包怎么刷，我刷不进

<ID:0/006> Initialzation..
<ID:0/006> Get PIT for mapping..
<ID:0/006> Firmware update start..
<ID:0/006> SingleDownload.
<ID:0/006> sbl1.mbn
<ID:0/006> NAND Write Start!!
<ID:0/006> FAIL! (Auth)
<ID:0/006>
<ID:0/006> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
死活刷不进，但官改包可以刷，但NFC开不了，所以我才想刷官方原版来修复NFC
求高手解答，在线等