Nokia 7210c Unlock Error

[crazy_kamal]

Always get this error...
how to solve it
Phone: Nokia 7210c
Interface: JAf N Ufs
Mx Ver: 3.4-1.0
Prob: Simlock Updation Error

Logs:

PHP Code:

SIMLOCK_DATA corrupted!
 
Backup already exist.
Using device: POTATO BOX, FW ver: 01.B1
Library version: 1.0.0.8336(03-05-2010), 1.0.0.12955(03-05-2010)
 
Product: V 07.23 17-07-09 RM-436 (c) Nokia             
 
SYSTEM ASIC ID: 000000010000022600010006030C192101033000 [RAP3G ver: PA 3.x]
ROOT KEY HASH: 9DDBFCFE6E73CED7D8C6268C8EB85723
ROM ID: 273F6D55DFAAF68F
 
Sending SecondaryBoot [rap3gv3_2nd.fg](0x3D00 bytes)  ...OK
Sending PreLoader(0x2E4 bytes) ...OK
Sending ROM(0x11BC bytes)  ...OK
Sending SecurityBlock(0x2000 bytes)  ...OK
Sending SimlockBinary(0x190 bytes)  ...OK
Sending KEYS [SL20] (0x19C0 bytes)  ...OK
Calculating LOCK data ...OK
Unlocked PM saved to "C:\mobileEx\3.4\data\backup\355231033650666_UNLOCKED.PM"
Writing Unlocked PM ... failed 


While Using SIM RPL:

SIMLOCK_DATA corrupted!
 
Using device: POTATO BOX, FW ver: 01.B1
Library version: 1.0.0.8336(03-05-2010), 1.0.0.12955(03-05-2010)
 
Product: V 07.23 17-07-09 RM-436 (c) Nokia             
 
Using cached productData[21100117AC087E561F5EED7366E90FCFCCE092F2] ...
 
Calculating SIMLOCK using security server ...
SERVER->Served by MXKEY - BLADE X at host2, agent version 1.0 revision 1.5

Completed in 15.688 s
 
RPL saved to "C:\mobileEx\3.4\data\backup\BB5_RM-436_355231033650666_SIM.RPL" 
Updating SIMLOCK...error 0x14
 
Reading Simlock info ...
SIMLOCK_DATA corrupted!