Unhappy [Q] Xperia X10 mini pro at SE logo
Hi I downloaded latest flashtool, and installed on my phone the recovery. It rebooted and now it's stuck at SE logo.
I tried several threads here, I downloaded a tft file (Xperia 2011 Range_FreeXperia_ALL) and tried to flash it using flashTool but no luck. Getting error ERR_SEVERITY="MAJOR";ERR_CLASS="SECURITY_CLASS";ER R_DYNAMIC="SIN header verification failed"

This is the log:
24/044/2012 14:44:40 - INFO - <- This level is successfully initialized
24/044/2012 14:44:40 - INFO - Flashtool Version 0.7.1.0 built on 2012-05-01 22:07:23
24/044/2012 14:44:40 - INFO - You can drag and drop ftf files here to start flashing them
24/044/2012 14:44:47 - INFO - Device disconnected
24/045/2012 14:45:04 - INFO - Selected Xperia_2011_FreeXperia_ALL.ftf
24/045/2012 14:45:04 - INFO - Preparing files for flashing
24/045/2012 14:45:04 - INFO - Please connect your device into flashmode.
24/045/2012 14:45:18 - INFO - Device connected in flash mode
24/045/2012 14:45:18 - INFO - Opening device for R/W
24/045/2012 14:45:18 - INFO - Reading device information
24/045/2012 14:45:18 - INFO - Phone ready for flashmode operations.
24/045/2012 14:45:18 - INFO - Start Flashing
24/045/2012 14:45:18 - INFO - Flashing loader
24/045/2012 14:45:18 - INFO - Ending flash session
24/045/2012 14:45:18 - ERROR - ERR_SEVERITY="MAJOR";ERR_CLASS="SECURITY_CLASS";ER R_DYNAMIC="SIN header verification failed"

Here is some additional info from my phone:
Code:
Action journal
14:48:48   Identify
14:48:48   Shows detailed information about the connected phone.
14:48:48   Operating system: Microsoft Windows 7 Home Premium Edition Service Pack 1 (build 7601), 64-bit
14:48:48   Application version: 1.38.4753
14:48:48 . The action name is 'Identification'
14:48:48   Selected phone type: Xperia™ X10 mini pro
14:48:48   Selected connection method: USB EROM
14:48:48 i Instructions
14:48:48 i 1. Make sure the phone battery is charged to at least 50%.
14:48:48 i 2. Switch off the phone!
14:48:48 i 3. Remove the phone battery and wait at least 5 seconds, then insert the battery back to the phone!
14:48:48 i 4. Press and hold the return back button, then connect the cable to the phone!
14:48:48 . The action started waiting for the user
14:49:02 . The action finished waiting for the user
14:49:02   Connecting via SEMC USB Flash Device (USB1)...
14:49:02   Device driver version: 2.2.0.5
14:49:02   Detected chipset: MSM7227
14:49:02   Boot mode: EROM
14:49:02   EROM version: 1229-3593 R8A027
14:49:02   Device ID: FF18E87E96CEE659B16D2F13293A43A28BA31F0F
14:49:02   Minimum loader AID: 0001
14:49:02   Color: Red SEMC
14:49:02   Sending loader...
14:49:03   Waiting for loader response...
14:49:05   Phone model (from TA): U20i
14:49:05   Current CXC (from TA): 1235-3411_2.1.1.A.0.6
14:49:05   Current CDA (from TA): 1237-6040_R11B
14:49:05   Current FS (from TA): WORLD-1-8_2.1.1.A.0.6
14:49:05 i The phone is not locked to a network.
14:49:05 i Simlock origin: SEMC
14:49:05 s Successfully done.
14:49:05 . The action entered shutdown phase
14:49:05 . The action reported success

Additional details
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2D A7 EF 59 EC E5 94 E5 86 93 10 4F 8A 4B C5 45 
BD 7C 
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SEUS fails while starting and Pc companion, asks me to enable usb and such.

Any help will be appreciated!
Thanks,
wreacK