[SOLVED] K800i success upgrading but.........

Thanks to the excellent instructions. advice and help on the forum I sucessfully changed my k800i to k810 and debranded it. 3 minutes of dire panic when I pressed Flash, but it worked!!! The only thing I cant do is unlock the damn thing - I keep getting "Block @ $44740000 read error. Have only: 00000000 bytes" .

I have scanned the Forum for help, but am a bit overwhelmed by it all, any help would be much appreciated.

I used
K810_R8BA024_FS_EUROPE_2_RED52.fbn
K810_R8BA024_MAIN_GENERIC_SM_RED52.mbn
Remove_SIM_lock_K810_R8BA024.vkp

Log is as follows:
ChipID:9900,EMP protocol:0301
PHONE IS RED RETAIL PRODUCT
FLASH CID detected:52
Speed:921600
Flash ID check:897E
Flash props sent ok
OTP LOCKED:1 CID:49 PAF:1 IMEI:3534270++++++++ CERT:RED
FLASH CID:52 COLOR:RED

Model:K810i
Brand:Generic Trade UK
MAPP CXC article: R8BA024 prgCXC1250811_GENERIC_SM
MAPP CXC version: R8BA024
Language Package:EUROPE_2
CDA article: CDA102511/2
CDA version: R6A
Default article: cxc1250813
Default version: R8BA024

Network LOCKED
Operator: 234-33

Elapsed:7 secs.
Going to execute VKP script....
ChipID:9900,EMP protocol:0301
PHONE IS RED RETAIL PRODUCT
FLASH CID detected:52
Speed:921600
OTP LOCKED:1 CID:49 PAF:1 IMEI:353427011++++++++ CERT:RED
FLASH CID:52 COLOR:RED
LDR:061201 1314 HANCXC1329129_DB2020_FLASHLOADER_R2A005
Flash ID check:897E
Flash props sent ok
Starting to process VKP patch script: E:\setool\SIMLockPatchGen\vkp\Remove_SIM_lock_K810 _R8BA024.vkp
VKP script loaded OK. Lines: 6
Patch structure created OK. Determining blocks to read...
New block #0000 added: $44740000
Blocks selected OK. Reading blocks: 1
Block @ $44740000 read error. Have only: 00000000 bytes
Elapsed:17 secs.

Did you follow step by step ?

Remove SIM-lock patch generator

Nice day

Thank you for pointing me in the right direction, it worked perfectly.
I had been using CID 49 instructions, stupidly forgetting I had upgraded phone to CID52. I shall give myself a good kick when I unfold my legs from under the laptop.