Rooted ICS - superuser does not work?

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http://forum.xda-developers.com – I've just updated to ICS via OTA, unlocked, flashed amonra, installed su from amonra (rooted). Titanium Backup cannot get root rights. Superuser (3.1.3) shows outdated binary (3.0.3). When I click "check for updates" and then Update, it downloads new binary, but then says "Gaining root access... fail!" What's wrong? Am I really rooted? Please help! (HowTos)