Root Cannot get Rumrunner to S-Off

[Slurms]

Bootloader: Unlocked
Running Android 4.1.1 Stock
HBOOT 2.15
SuperSU v2.0.1

OS: Windows 8.1

I can't seem to figure out why my device won't S-OFF. I've followed the instruction carefully but it seem it just can't get past the following...

i62.tinypic.com/29w7sxg .png

^ sorry for the broken up link, first post :/

FIXED: Used Windows 7 instead