k510 erom , mainfirmware

[riders4sia]

i use custtom files and FS of same region and use
K510_R4CH003_MAIN_GENERIC_RED49.mbn as main flash
K510_R4EA031_MAIN_GENERIC_CO_RED49.mbn

now i am getting error
configuration error please contact ur system admin or network operator

that's what i am talking about the custpack, configuration error means you did not flash the custpack. use these files and are in order in which you should flash
First MAIN : K510_R4EA031_MAIN_GENERIC_CO_RED49
Second FS : K510_R4EA031_FS_S_ASIA_LEVAN_RED49
Third custpack : CLEO_DORIS_CDA102459_110_R3A_Generic_S_ASIA_LEVAN
in setool, select the phone model, click the Add button and select MAIN first and then FS, now on the MISC file, click the ... and select the CLEO_DORIS_CDA102459_110_R3A_Generic_S_ASIA_LEVAN. zip and click flash, that's all. Pls post result