Help pls.. I'm new to this AT&T root thing and I bricked my phone..

I was trying to downgrade through Odin 3.10 to 4.4.4.. now i'm stuck with a error
<ID:0/003> Odin engine v(ID:3.1005)..
<ID:0/003> File analysis..
<ID:0/003> SetupConnection..
<ID:0/003> Initialzation..
<ID:0/003> Set PIT file..
<ID:0/003> DO NOT TURN OFF TARGET!!
<ID:0/003> Get PIT for mapping..
<ID:0/003> Firmware update start..
<ID:0/003> SingleDownload.
<ID:0/003> aboot.mbn
<ID:0/003> NAND Write Start!!
<ID:0/003> sbl1.mbn
<ID:0/003> rpm.mbn
<ID:0/003> FAIL! (Auth)
<ID:0/003>
<ID:0/003> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
Some one please help me if there is any way to fix this problem..

Mega 6.3 LP (5.1.1) Req xposed for Mutiwindow, pls....

Dear Team xda
please help me to install xposed for ss mega 6.3, I root my device is LP 5.1.1 / i nned to use mutiwindow for 5.1.1 mega

please guide to me pls.....
:D:D:D