Need Help W850 Upgrade

[senter]

hi there
m newbie here i had w850i which had prb of white lifht flash
so i did flashing on it using XS++ but by mistake my main and fs was difference now i got proper main and fs but wen i tried to flash it says as given below
.......
19:02:59| EROM CID: 52
........
can any one plz help me with this

Must use firmware for CID52, not CID49.