I installed avast! Mobile Security and Anti-Theft on my girlfriend’s LG Optimus L3 (E400). The phone is rooted and running a custom ROM (CyanogenMod 9), Android version 4.0.4 (Ice Cream Sandwich). I tried to edit some settings in the anti-theft app that are available only for rooted phones, but they are disabled, as if the phone is not rooted.
not only the phone needs to be rooted - Anti-Theft needs to be installed in rooted mode aswell.
please uninstall Anti-Theft (use the anti-theft-removal-wizard in mobile security’s settings) and reinstall in advanced mode. you can select rooted installation there.