HELP! Mistakenly changed CID 51 to 52 with XS++ on a Z550.

It seemed like a good idea to upgrade CID 51 to 52 when XS+ asked me so...

But now, I can't find any main file with CID 52 to flash my Z550a. From what I understand, there is no coming back once you have changed the CID. Is that true? And is there any other flash file I could use?

Here is the log when I connect my phone

2:12:42| Baseband ID: 8040
22:12:42| Protocol Version: 3.1
22:12:42| NEW SECURITY PHONE DETECTED! SWITCHING...
22:12:42| Phone name detected!
22:12:42|
22:12:42| Profiling SEMC phone...
22:12:42| Platform: DB2010
22:12:42| OTP CID: 51
22:12:42| EROM CID: 52
22:12:42| EROM Color: Red
22:12:42| IMEI: 35350501xxxxxx
22:12:42| Phone ID: Z550
22:12:42| Region: ROGERS
22:12:42| CDA: CDA102731/35 R2A
22:12:42| Firmware Version: R6GA004
22:12:42| EROM: n/a
22:12:43| Ready for operation!

Thnaks for your help!

i think there is no problem with updating the cid..
but finding the main file is quite a problem..
try tio at these website..
Home - iProTebe.cz - VÅ*E pro Mobily, XDA (PDA, MDA) | Czech by SiViN
http://www.sony-style.com..
there is main file for ur phone in iprotebe.cz...
i've checked

Thanks for your help.

I did get the files, but is it a problem if they are CID 49 while my phone has CID 51?

I tried to flash my phone and here is a log of what happened:

11:36:54| Hold 'C' button on phone and connect phone NOW.
11:36:54| You have 30 seconds...
11:36:54|
11:37:01| Baseband ID: 8040
11:37:01| Protocol Version: 3.1
11:37:01| NEW SECURITY PHONE DETECTED! SWITCHING...
11:37:01| Phone name detected!
11:37:01|
11:37:01| Profiling SEMC phone...
11:37:01| Platform: DB2010
11:37:01| OTP CID: 51
11:37:01| EROM CID: 52
11:37:01| EROM Color: Red
11:37:01| IMEI: 35350501xxxxxx
11:37:01| Phone ID: Z550
11:37:01| Region: ROGERS
11:37:01| CDA: CDA102731/35 R2A
11:37:01| Firmware Version: R6GA004
11:37:01| EROM: n/a
11:37:01| Ready for operation!
11:37:15|
11:37:15| Sending db2010_db2012_cid52red_flash_r2b012.bin...
11:37:15| Applet ID: 061205 1354 HAN_DB2012_FLASHLOADER_R2B012_CXC1326738
11:37:15| This is a FLASH loader
11:37:15| Now flashing firmware main...
11:37:15| Flashing c:\documents and settings\gîte\bureau\z550_r6ca009_main_generic_red 49.mbn
11:37:15| Header type: BABE
11:37:15| 338 flashblocks
11:37:17| Binary acknowledge failed with: 15
11:37:17| Command: Error 0x15
11:37:17| Failed sending flashblock 1. Returnvalue 0xF7FE2000
11:37:17| Finishing flash

try to look in this site
Ìåíåäæåð çàãðóçîê äëÿ Sony Ericsson - R6GA004_CID49 - Top SE Forum site)
suppose u have to find a red51 main file actually
find a tutorial about how to use XS++