Ok, this is really weird now
The infusion systemui doesn't even work at all when used on a stock rom (B960). No FC's, no statusbar
I'm pretty puzzled now as I added it to my rom, and signed it too.
when you run the tool on the first page make sure you see SystemUI been signed and zipalingned, rather than "skipped"
if it says skipped that's the problem, as the systemUI needs signed with the same key as the other core apps.