請問蝴蝶4.4.2版官解部分到最後卻顯示...請看

Unlocking Bootloader Failed!

Sorry it didn"t work out. Here"s why:



Required Resources

Please make sure all items are installed and up to date.

Google Android SDK zip:
http://developer.android.com/sdk/index.html
Java Runtime Environment:
http://java.com
HTC Sync (Windows Only):
http://www.htc.com/www/help/

We"re sorry, but it appears your attempt to unlock the bootloader on this device has failed. This could be caused by several factors including simple errors in the entry of the unlock token, problems with your device, or a lack of manufacturer support for the unlocking process. Please see the specific error code listed below, and try again if necessary.
Error Code: Invalid Bootloader Token Length.
Error Reason: The submitted Token appears to be the wrong length and won"t work.
官方解鎖最後卻出現此等畫面.導致接下來就都與其他步驟無法接上軌
請問知情的大大們是否有此經歷過又是有何高見?拜託了