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