honor 6 with b380 not able to update

hello buddies
can someone help im not able to install emui 3.1 on honor 6 lo-4. so can anyone tell me i tried using the updater update
i extracted files from it and put into dload folder and tried to update then it sayd update failed but when i flash updates with only update.app in them it succeeds can somebody help me please i need help please what to do