Error in unlocking bootloader in xperia ray with testpoint method

I was following guide to unlock my bootloader while preserving DRM data. http://androidflip.com/unlock-xperia-phones-bootloader-without-losing-drm-data-track-id-working/ Everything went fine except the last one. Here is the log I did all the steps in guide and receiving error for my xperia ray :crying: Here is the log Welcome to S1 tool. That is small and crippled subset of SETOOL2 service tool. DETACH USB CABLE FROM PHONE REMOVE BATTERY FROM PHONE ATTACH TESTPOINT PRESS "READY", THEN ATTACH USB CABLE TO PHONE PROCESSING ... REMOVE TESTPOINT NOW, THEN PRESS "READY" qcReceivePacket: can't get packet start. Elapsed:24 secs. Couldn't find a suitable answer in google. Any help? Infos: Boot loader unlock allowed : Yes Build date 12W23 Can go to flash mode.