Note 4 and odin won't work :( please HELP, im trying to downgrade to kitkat

[Spartacus MD]

I am trying to downgrade my lollipop to to kitkat.

I followed all of the instructions but whenever I get to the part where odin tries to install i get this:

<ID:0/005> Added!!
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> ALL_ATT_N910AUCU1ANIE_N910AATT1ANIE_CL2774708_QB2373670_REV00_user_low_ship_MULTI_CERT.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/005> Odin v.3 engine (ID:5)..
<ID:0/005> File analysis..
<ID:0/005> SetupConnection..
<ID:0/005> Initialzation..
<ID:0/005> Set PIT file..
<ID:0/005> DO NOT TURN OFF TARGET!!
<ID:0/005> Get PIT for mapping..
<ID:0/005> Firmware update start..
<ID:0/005> SingleDownload.
<ID:0/005> aboot.mbn
<ID:0/005> NAND Write Start!!
<ID:0/005> sbl1.mbn
<ID:0/005> rpm.mbn
<ID:0/005> FAIL! (Auth)
<ID:0/005>
<ID:0/005> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)






Restriction lock is OFF.
Firmware is correct sm-910A for ATT
I followed all the steps to the point as noted in the following website: Galaxy Note 4: How to Downgrade to Android 4.4.4 KitKat

Why does my odin keep failing? If i let my device boot up it will go into lollipop again...

 

[nahoku]

For Verizon, once the "official" LP firmware (OF1) is installed via OTA or Kies, the phone is stuck on LP and cannot be downgraded to KitKat. It's due to an incremented bootloader that VZW sent out in one of their LP updates. I imagine this may be true for ATT also, but I don't know for sure. You may also want to visit XDA ATT forum and perhaps post your question there too.