Downgrade to CID52 with Omnius:
You must have registration here: http://www.omnius-server.com/um/registration
Then activate your account from email - if you haven't this email resend activation link from http://www.cruiserlog.net/
And make this:
From now the program will tell you what to do!
Then flash with XS++v3.1 or Setool and use these files:
1. K800_R8BF003_MAIN_GENERIC_WI_RED52
2. K800_R8BF003_FS_EUROPE_4_RED52
3. HB1-06_Gen_CDA102568_13_R8A_GENERIC_EUROPE_4