Somebody Help!!!! I cant return my phone back to stock

[LordMarq]

First things first im a newbie at rooting and stuff.
ive been trying out this rom for galaxy s4 mini and I don't really like so ive tried flashing it back to the stock rom but every time I try to use odin to flash the firmware back to stock it says this:
<ID:0/005> Added!!
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> L520VPUAMK2_L520SPTAMK2_L520VPUAMK2_HOME.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> Get PIT for mapping..
<ID:0/005> Firmware update start..
<ID:0/005> sbl2.mbn
<ID:0/005> NAND Write Start!!
<ID:0/005> sbl3.mbn
<ID:0/005> rpm.mbn
<ID:0/005> aboot.mbn
<ID:0/005> FAIL! (Auth)
<OSM> All threads completed. (succeed 0 / failed 1)

so every time I try to flash it fails and ive tried different usb ports, formatting the phone and cache with clockwork recovery mod but still dosent work


Somebody Please Help!!!!!

 

[mobilecrackers]

First things first im a newbie at rooting and stuff.
ive been trying out this rom for galaxy s4 mini and I don't really like so ive tried flashing it back to the stock rom but every time I try to use odin to flash the firmware back to stock it says this:
<ID:0/005> Added!!
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> L520VPUAMK2_L520SPTAMK2_L520VPUAMK2_HOME.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> Get PIT for mapping..
<ID:0/005> Firmware update start..
<ID:0/005> sbl2.mbn
<ID:0/005> NAND Write Start!!
<ID:0/005> sbl3.mbn
<ID:0/005> rpm.mbn
<ID:0/005> aboot.mbn
<ID:0/005> FAIL! (Auth)
<OSM> All threads completed. (succeed 0 / failed 1)

so every time I try to flash it fails and ive tried different usb ports, formatting the phone and cache with clockwork recovery mod but still dosent work


Somebody Please Help!!!!!

enable usb debugging from your phone
use different version of odin
do not use a usb hub
Tick Autoreboot and f-reset time