Thx, rooted my Phone on FW .42.
BUT:
When i try to flash another Kernel with fastboot, fastboot says that phone is rooted.
If phone restarts in Fastboot-Mode, it says that its not rooted?
...
14/045/2012 12:45:54 - INFO - Connected device : ST15
14/045/2012 12:45:55 - INFO - Installed version of busybox : BusyBox v1.19.3-Stericson (2011-11-01 20:22:18 CDT) multi-call binary.
14/045/2012 12:45:55 - INFO - Android version : 2.3.4 / kernel version : 2.6.32.9-perf
14/045/2012 12:45:56 - INFO - Root Access Allowed
14/046/2012 12:46:23 - INFO - Launching Fastboot Toolbox 1.0 by DooMLoRD
14/046/2012 12:46:24 - INFO - Device Status: ADB mode
14/046/2012 12:46:29 - INFO - Please wait device is rebooting into fastboot mode (via ADB)
14/046/2012 12:46:34 - INFO - Device will soon enter fastboot mode
14/046/2012 12:46:34 - INFO - Device disconnected
14/046/2012 12:46:36 - INFO - Device connected in fastboot mode
14/047/2012 12:47:26 - INFO - Selected kernel (boot.img or kernel.sin): C:\Users\Kilgore Mobile\Desktop\Neuer Ordner\boot.img
14/047/2012 12:47:26 - INFO - Flashing selected kernel
14/047/2012 12:47:27 - INFO - FASTBOOT Output:
sending 'boot' (5940 KB)...
FAILED (remote: The Device must be rooted first)
finished. total time: 0.003s
14/047/2012 12:47:27 - INFO - Please check the log before rebooting into system
14/047/2012 12:47:44 - INFO - Finished Fastboot Toolbox
14/048/2012 12:48:31 - INFO - Device disconnected
Any help?!?