Si, lo tengo todo activado, de todas formas, mañana seguiré probando, porq me parece que el problema viene al flashear el kernel que uno de los mensajes pregunta si soy root... lo dicho, mañana seguiré probando.
EDITO: Al flashear el Kernel sale esto
16/003/2012 23:03:44 - INFO - <- This level is successfully initialized
16/003/2012 23:03:44 - INFO - Flashtool Version 0.8.5.0 built on 2012-06-03 20:17:43
16/003/2012 23:03:44 - INFO - You can drag and drop ftf files here to start flashing them
16/003/2012 23:03:49 - INFO - Device disconnected
16/003/2012 23:03:54 - INFO - Device connected in flash mode
16/004/2012 23:04:06 - INFO - Selected LT18i_4.1.B.0.431_ONLY KERNEL.ftf
16/004/2012 23:04:06 - INFO - Preparing files for flashing
16/004/2012 23:04:06 - INFO - Please connect your device into flashmode.
16/004/2012 23:04:06 - INFO - Opening device for R/W
16/004/2012 23:04:06 - INFO - Reading device information
16/004/2012 23:04:06 - INFO - Phone ready for flashmode operations.
16/004/2012 23:04:06 - INFO - Start Flashing
16/004/2012 23:04:06 - INFO - Flashing loader
16/004/2012 23:04:09 - INFO - Loader : S1_Loader_Root_773f - Version : R4A066 / Bootloader status : NOT_ROOTABLE
16/004/2012 23:04:09 - INFO - Disabling final data verification check
16/004/2012 23:04:09 - INFO - Flashing kernel.sin
16/004/2012 23:04:11 - INFO - Ending flash session
16/004/2012 23:04:11 - INFO - Flashing finished.
16/004/2012 23:04:11 - INFO - Please wait. Phone will reboot
16/004/2012 23:04:11 - INFO - For flashtool, Unknown Sources and Debugging must be checked in phone settings
16/004/2012 23:04:11 - INFO - Device connected in flash mode