[Xperia Play Q&A, Help & Troubleshooting] H3LLSYSTEM:
Hey guys,

i want to install the DoomKernel on my Xperia Play which is rooted.Im running the firmware 2.3.4.

when ever i try to click the thunder icon on Flashtool i select Fastboot mode then Rebot into fastboot mode (via ADB) i get this error:

31/050/2012 20:50:34 - INFO - <- This level is successfully initialized

31/050/2012 20:50:34 - INFO - Flashtool Version 0.9.0.0 built on 2012-07-19 22:57:15

31/050/2012 20:50:34 - INFO - You can drag and drop ftf files here to start flashing them

31/050/2012 20:50:39 - INFO - Device connected in fastboot mode

31/050/2012 20:50:41 - INFO - Device disconnected

31/051/2012 20:51:40 - INFO - Device connected with USB debugging off

31/051/2012 20:51:40 - INFO - For 2011 devices line, be sure you are not in MTP mode

31/051/2012 20:51:51 - INFO - Device connected with USB debugging on

31/051/2012 20:51:52 - INFO - Connected device : R800

31/051/2012 20:51:52 - INFO - Installed version of busybox : N/A

31/051/2012 20:51:52 - INFO - Android version : 2.3.4 / kernel version : 2.6.32.9-perf

31/051/2012 20:51:57 - INFO - Pushing C:\Flashtool\.\devices\R800\busybox\1.19.0\busybox to /data/local/tmp/busybox

31/051/2012 20:51:58 - INFO - Pushing C:\Flashtool\.\custom\root\zergrush.tar.uue to /data/local/tmp

31/051/2012 20:51:58 - INFO - Running part1 of Root Exploit, please wait

31/052/2012 20:52:22 - INFO - Waiting for device

31/052/2012 20:52:22 - INFO - Device disconnected

31/052/2012 20:52:27 - INFO - Device connected with USB debugging on

31/052/2012 20:52:28 - INFO - Running part2 of Root Exploit

31/052/2012 20:52:28 - INFO - Running rootit2

31/052/2012 20:52:31 - INFO - Finished!.

31/052/2012 20:52:31 - INFO - Root should be available after reboot!

31/052/2012 20:52:31 - INFO - Device disconnected

31/053/2012 20:53:39 - INFO - Device connected with USB debugging on

31/053/2012 20:53:39 - INFO - Connected device : R800

31/053/2012 20:53:39 - INFO - Installed version of busybox : BusyBox v1.19.0 (2011-08-14 23:46:58 CDT) multi-call binary.

31/053/2012 20:53:39 - INFO - Android version : 2.3.4 / kernel version : 2.6.32.9-perf

31/053/2012 20:53:40 - INFO - Remounting system read-write

31/053/2012 20:53:40 - INFO - Installing toolbox to device...

31/053/2012 20:53:40 - INFO - Pushing C:\Flashtool\custom\root\ftkit.tar to /data/local/tmp

31/053/2012 20:53:40 - INFO - Running installftkit as root thru sysrun

31/053/2012 20:53:40 - INFO - Root Access Allowed

31/053/2012 20:53:47 - INFO - Launching Fastboot Toolbox 1.0 by DooMLoRD

31/053/2012 20:53:47 - INFO - Device Status: ADB mode

31/053/2012 20:53:48 - INFO - Please wait device is rebooting into fastboot mode (via ADB)

31/053/2012 20:53:51 - INFO - Device will soon enter fastboot mode

31/053/2012 20:53:51 - INFO - Device disconnected

31/053/2012 20:53:53 - INFO - Device connected in fastboot mode

31/053/2012 20:53:58 - INFO - Selected kernel (boot.img or kernel.sin): C:\Flashtool\PLAY-ICS-Beta-DooMKernel-v03_boot.img

31/053/2012 20:53:58 - INFO - Flashing selected kernel

31/053/2012 20:53:59 - INFO - sending 'boot' (9106 KB)...

31/053/2012 20:53:59 - INFO - FAILED (remote: The Device must be rooted first)

31/053/2012 20:53:59 - INFO - finished. total time: 0.001s

31/053/2012 20:53:59 - INFO - FASTBOOT Output:

sending 'boot' (9106 KB)...

FAILED (remote: The Device must be rooted first)

finished. total time: 0.001s

31/053/2012 20:53:59 - INFO - Please check the log before rebooting into system