The problem is that when I write "su" in the terminal emulator, I have "su: uid 10032 not allowed su". So why should I run the emulator?
When entering the emulator, you must be root:
$ adb shell # ps ... root 271 37 740 312 c003b100 afe0d14c S /system/bin/sh ... #
What do you get on the sh ps line?