Odin Problems

[rmadrid20]

Well I got my T-mobile Lollipop Update last night and I wanted to root the phone but for some odd reason i got this...

<ID:0/005> Added!!
<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> boot.img
<ID:0/005> NAND Write Start!!
<ID:0/005> FAIL! (Auth)
<OSM> All threads completed. (succeed 0 / failed 1)

Any suggestions, Am I doing something wrong?
Thanks All