Apple Magic Trackpad aftrer upgrade from Ubuntu 11.10 to Ubuntu 12.04 (64 Bit) - Multitouch not working!

The title describes my problem. On Ubuntu 11.10 Multi-touch worked fine on my Apple Magic Trackpad. Now i have only "ONE-FINGER-Control". Scrolling is only possible on the right side of the pad with one finger. Three or four fingers are also not working any more (four fingers to to get the Dash or three fingers to move a window). What could I do to get this working again?? (on 12.04)

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Have you tried re-installing all of your drivers yet? –  TenorB May 8 '12 at 17:53
no, i didn't install any driver on 11.10. I don't know what to re-install. I only did the pairing by "Using the Commandline" (from wiki.ubuntu.com/Multitouch/AppleMagicTrackpad) because there exists a bug: bugs.launchpad.net/ubuntu/+source/bluez/+bug/618838 –  Marian Lux May 9 '12 at 6:04

To get this working I had to install utouch:

apt-get install utouch