[Sony Cross-Device General] TrReCoN:
loader.sin and kernel.sin does not appear here.

and;

flashtool version : 0.6.7.0 log

27/050/2012 20:50:44 - INFO - Device connected in flash mode
27/050/2012 20:50:44 - INFO - Opening device for R/W
27/050/2012 20:50:45 - INFO - Reading device information
27/050/2012 20:50:45 - INFO - Phone reading for flashing.
27/050/2012 20:50:45 - INFO - Start Flashing
27/050/2012 20:50:45 - INFO - Flashing loader
27/050/2012 20:50:46 - INFO - Loader version : R4A045 / Bootloader status : ROOTED
27/050/2012 20:50:47 - INFO - Flashing finished.
27/050/2012 20:50:47 - INFO - Please wait. Phone will reboot
27/050/2012 20:50:47 - INFO - For flashtool, Unknown Sources and Debugging must be checked in phone settings
27/050/2012 20:50:47 - INFO - Device connected in flash mode
27/050/2012 20:50:48 - INFO - Device disconnected

27/051/2012 20:51:15 - INFO - Device connected with USB debugging off
27/051/2012 20:51:15 - INFO - For 2011 devices line, be sure you are not in MTP mode
27/051/2012 20:51:16 - INFO - Device disconnected
27/051/2012 20:51:18 - INFO - Device connected with USB debugging on
27/051/2012 20:51:21 - INFO - Connected device : U20
27/051/2012 20:51:21 - INFO - Installed version of busybox : N/A
27/051/2012 20:51:21 - INFO - Android version : 2.1-update1 / kernel version : 2.6.29

flashtool v0.5.3 log :(

28/034/2012 11:34:49 - INFO - Searching Xperia....
28/034/2012 11:34:50 - INFO - Found at USB\VID_0FCE&PID_ADDE\5&8080175&0&3
28/034/2012 11:34:50 - INFO - VER="r8A029";DATE="20100601";TIME="12:17:00";
28/034/2012 11:34:50 - INFO - Phone already unlocked
28/034/2012 11:34:50 - WARN - Cancelled

28/031/2012 11:31:08 - INFO - Searching Xperia....
28/031/2012 11:31:08 - INFO - Found at USB\VID_0FCE&PID_ADDE\5&8080175&0&3
28/031/2012 11:31:08 - INFO - Start Flashing

28/031/2012 11:31:08 - INFO - VER="r8A029";DATE="20100601";TIME="12:17:00";
28/031/2012 11:31:08 - INFO - Flashing loader
28/031/2012 11:31:10 - INFO -PROT_VER="02";DATE="20100615";TIME="17:28:00";VER="R4A045";CXC="1229-3641";TYPE="S1_LOADER";UNIQUE_DEV_ID="7B424E52BDC1343270711BC34B673DD42AC200F6";SEC_LOCK_STATUS="LOCKED";OTP_DATA="4DFD7700470404000F080420DA9E4FBD";IMEI="*************";AID_VERSION="0004";EROM_AID="0001";LOADER_AID="0001";SW_AID="0001";CUST_AID="0001";SIM_LOCK_AID="0001";HWCONF_AID="0001";PROD_AID="0000";ACTIVE_LOADER_AID="0001";MAN_ID="00EC";DEV_ID="00BC";EXT_DEV_ID="0055";SIN_VER="0001";AID_TAMP="NOT_TAMPERED";MAX_PKT_SZ="00010000";AUTH_LEVEL="NONE";AUTH_MET="0001";CARD_PRESENT="YES";CARD_SIZE="2GB";CARD_DATA="UHJvZE5vPTEyNDMtNTM0Mw1Qcm9kUmV2PVI2QQ1Db3BpZWRCeXRlcz0zMzkzMDUzNDYNQ29waWVkRmlsZXM9MTAxNjcNQ29waWVkRGlycz02OA1PcmRlcj05MDE4MDcxLTEwDQ==";LOADER_ROOT="S1_Loader_Root_8e35";EROM_ROOT="S1_EROM_Root_f54f";SW_ROOT="S1_SW_Root_3edc";CUST_ROOT="S1_Cust_Root_732f";SIM_LOCK_ROOT="S1_SL_Root_a640";HW_CONF_ROOT="S1_HWConf_Root_4b8c";
28/031/2012 11:31:10 - INFO - Flashing finished.
28/031/2012 11:31:10 - INFO - Now unplug the device and power it on

28/031/2012 11:31:10 - INFO - Then go to application settings
28/031/2012 11:31:10 - INFO - turn on Unknown Sources and Debugging

8/032/2012 11:32:30 - INFO - Device connected with USB debugging on
28/032/2012 11:32:32 - INFO - Connected device : U20
28/032/2012 11:32:32 - INFO - Installed version of busybox : BusyBox v1.19.0 (2011-08-14 23:46:58 CDT) multi-call binary.
28/032/2012 11:32:32 - INFO - Android version : 2.1-update1 / kernel version : 2.6.29
28/032/2012 11:32:34 - INFO - Root Access Allowed