z550a dead and HDR block not accepted,error:2

I`ve received a z550a dead phone. I think it was updated to CID52 and I don´t find any MAIN + FS CID52. So when I try to flash it with CID 51 or CID49 MAIN, I got this:

24/04/2009 22:22:49 v0.914034/UNI
24/04/2009 22:22:49 CARD SERIAL:
24/04/2009 22:22:49 Loaded 51 flash descriptors
24/04/2009 22:23:27 ChipID:8040,EMP protocol:0301
24/04/2009 22:23:27 NEW SECURITY MODEL DETECTED
24/04/2009 22:23:27
24/04/2009 22:23:27 PHONE IS RED RETAIL PRODUCT
24/04/2009 22:23:27 FLASH CID detected:52
24/04/2009 22:23:27 Speed:921600
24/04/2009 22:23:28 Flash ID check:897E
24/04/2009 22:23:28 Flash props sent ok
24/04/2009 22:23:28 OTP LOCKED:1 CID:51 PAF:1 IMEI:35350501253740 CERT:RED
24/04/2009 22:23:28 FLASH CID:52 COLOR:RED
24/04/2009 22:23:28 set_gdfs_props failed, exiting
24/04/2009 22:23:28 Elapsed: 9 secs.
24/04/2009 22:25:56 ChipID:8040,EMP protocol:0301
24/04/2009 22:25:56 NEW SECURITY MODEL DETECTED
24/04/2009 22:25:57
24/04/2009 22:25:57 PHONE IS RED RETAIL PRODUCT
24/04/2009 22:25:57 FLASH CID detected:52
24/04/2009 22:25:57 Speed:921600
24/04/2009 22:25:57 OTP LOCKED:1 CID:51 PAF:1 IMEI:35350501253740 CERT:RED
24/04/2009 22:25:58 LDR:061205 1354 HAN_DB2012_FLASHLOADER_R2B012_CXC1326738
24/04/2009 22:25:58 Flash ID check:897E
24/04/2009 22:25:58 Flash props sent ok
24/04/2009 22:25:58 phone CID not supported in that mode
24/04/2009 22:25:58 Elapsed: 23 secs.
24/04/2009 22:26:48 SIGNED MODE (USING SERVER).
24/04/2009 22:27:07 ChipID:8040,EMP protocol:0301
24/04/2009 22:27:07 NEW SECURITY MODEL DETECTED
24/04/2009 22:27:08
24/04/2009 22:27:08 PHONE IS RED RETAIL PRODUCT
24/04/2009 22:27:08 FLASH CID detected:52
24/04/2009 22:27:08 Speed:921600
24/04/2009 22:27:08 OTP LOCKED:1 CID:51 PAF:1 IMEI:35350501253740 CERT:RED
24/04/2009 22:27:08 LDR:061205 1354 HAN_DB2012_FLASHLOADER_R2B012_CXC1326738
24/04/2009 22:27:08 Flash ID check:897E
24/04/2009 22:27:08 Flash props sent ok
24/04/2009 22:27:08 writing D:\01_Moviles\03_SETool\1 Flashes\SonyEricsson\Z550\Z550_R6GA004_MAIN_GENERI C_ML_RED51\Z550_R6GA004_MAIN_GENERIC_ML_RED51.mbn
24/04/2009 22:27:09 CURRENT FLASH FILE CID:51
24/04/2009 22:27:09 SSW uses complete hash, hash len is:6780
24/04/2009 22:27:09 HDR block not accepted,error:2
24/04/2009 22:27:09 Elapsed: 21 secs.
24/04/2009 22:28:20 SIGNED MODE (USING SERVER).
24/04/2009 22:28:38 ChipID:8040,EMP protocol:0301
24/04/2009 22:28:38 NEW SECURITY MODEL DETECTED
24/04/2009 22:28:39
24/04/2009 22:28:39 PHONE IS RED RETAIL PRODUCT
24/04/2009 22:28:39 FLASH CID detected:52
24/04/2009 22:28:39 Speed:921600
24/04/2009 22:28:39 OTP LOCKED:1 CID:51 PAF:1 IMEI:35350501253740 CERT:RED
24/04/2009 22:28:40 LDR:061205 1354 HAN_DB2012_FLASHLOADER_R2B012_CXC1326738
24/04/2009 22:28:40 Flash ID check:897E
24/04/2009 22:28:40 Flash props sent ok
24/04/2009 22:28:40 writing D:\01_Moviles\03_SETool\1 Flashes\SonyEricsson\Z550\Z550_R6CA009_MAIN_GENERI C_ML_RED49\Z550_R6CA009_MAIN_GENERIC_ML_RED49.mbn
24/04/2009 22:28:40 CURRENT FLASH FILE CID:49
24/04/2009 22:28:40 Matching CID according file...
24/04/2009 22:28:41 SSW uses dynamic hash, dynamic hash len is:338
24/04/2009 22:28:41 HDR block not accepted,error:2
24/04/2009 22:28:41 Elapsed: 20 secs.
24/04/2009 22:29:21 SIGNED MODE (USING SERVER).
24/04/2009 22:29:28 ChipID:8040,EMP protocol:0301
24/04/2009 22:29:28 NEW SECURITY MODEL DETECTED
24/04/2009 22:29:28
24/04/2009 22:29:28 PHONE IS RED RETAIL PRODUCT
24/04/2009 22:29:28 FLASH CID detected:52
24/04/2009 22:29:28 Speed:921600
24/04/2009 22:29:29 OTP LOCKED:1 CID:51 PAF:1 IMEI:35350501253740 CERT:RED
24/04/2009 22:29:29 LDR:061205 1354 HAN_DB2012_FLASHLOADER_R2B012_CXC1326738
24/04/2009 22:29:29 Flash ID check:897E
24/04/2009 22:29:29 Flash props sent ok
24/04/2009 22:29:29 writing D:\01_Moviles\03_SETool\1 Flashes\SonyEricsson\Z550\R6CA009_1250583_GENERIC_ ML.ssw.cry
24/04/2009 22:29:35 CURRENT FLASH FILE CID:49
24/04/2009 22:29:35 Matching CID according file...
24/04/2009 22:29:36 SSW uses dynamic hash, dynamic hash len is:338
24/04/2009 22:29:36 HDR block not accepted,error:2
24/04/2009 22:29:36 Elapsed: 14 secs.

What do I have to do?
Thanks in advance.

update it with SEUS, that's the only way you can revive your phone

Thanks riders4sia

But I`m new with SETool3 Box. How can I update it with SEUS?

install SEUS from sony website and run the program, you can also get the SEUS from the provided disk of the phone

If still problem by flashing you can rehot or change ic flash...i ever try and success for this case