@sur1k i tried using s1tool here is the log
10/3/2011 10:23:45 AM DETACH USB CABLE FROM PHONE
10/3/2011 10:23:45 AM REMOVE BATTERY FROM PHONE
10/3/2011 10:23:45 AM ATTACH TESTPOINT
10/3/2011 10:23:45 AM PRESS "READY", THEN ATTACH USB CABLE TO PHONE
10/3/2011 10:23:45 AM
10/3/2011 10:23:56 AM PROCESSING ...
10/3/2011 10:23:57 AM REMOVE TESTPOINT NOW, THEN PRESS "READY"
10/3/2011 10:23:57 AM
10/3/2011 10:24:03 AM
10/3/2011 10:24:03 AM TO CONNECT NEXT PHONES
10/3/2011 10:24:03 AM X10 Xperia,E10 Mini,E15 Xperia X8,U20 Mini Pro
10/3/2011 10:24:03 AM LT15 Xperia ARC,MT15 Xperia NEO,R800 Xperia PLAY
10/3/2011 10:24:03 AM PRESS AND HOLD "BACK" BUTTON...
10/3/2011 10:24:03 AM
10/3/2011 10:24:03 AM ST18 Xperia RAY,ST15 Xperia Mini,SK17 Xperia Mini Pro
10/3/2011 10:24:03 AM PRESS AND HOLD "Volume Down" BUTTON...
10/3/2011 10:24:03 AM
10/3/2011 10:24:03 AM PLEASE ATTACH TURNED OFF PHONE NOW
10/3/2011 10:24:03 AM
10/3/2011 10:24:04 AM
10/3/2011 10:24:04 AM RUNNING S1_LOADER VER "R4A062"
10/3/2011 10:24:04 AM LOADER AID: 0001
10/3/2011 10:24:05 AM FLASH ID: "0098/00B3"
10/3/2011 10:24:05 AM LOADER VERSION: "r4A069"
10/3/2011 10:24:05 AM
10/3/2011 10:24:05 AM
10/3/2011 10:24:05 AM SEMC SIMLOCK CERTIFICATE, PROCEEDING
10/3/2011 10:24:05 AM FINISHED
10/3/2011 10:24:05 AM Elapsed:20 secs.
but still bootloader is not unlocked i check by volume down method on booting but it simply start no bootloader coming