Can't Re-Root Droid 4

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http://forum.xda-developers.com – So I've had my Droid 4 for a little while (late July). As soon as I got it I rooted it with MotoFail to freeze all of the apps that I could to save battery life. I recently (Last week) got the OTA 4.0.4 update which of course erased my Gingerbread root. So I used Rick#2's ICS404Root.zip exploit to re-root my phone. Or so I thought. Superuser is loaded, but when I open Antek App Manager it says that it was not granted superuser privileges, and if I go to home and try to re-open it I just get a black screen. Root uninstaller also gets denied. Superuser will not update scripts, and the superus (HowTos)