How to unlock k660?

I TRIED MANY TIMES.
this logs.
v0.914034/UNI
CARD SERIAL: ----------
Loaded 51 flash descriptors
SIGNED MODE (USING SERVER).
SERVER CREDITS LEFT/USED: 12/18
CARD COUNTERS: FLASH 3, UNLOCK 0
Elapsed: 2 secs.
SIGNED MODE (USING SERVER).
ChipID:C900,EMP protocol:0401
BOOTROM MODE DETECTED
OTP LOCKED:1 CID:52 PAF:1 IMEI:-------------- CERT:RED
LDR:2008-01-28 16:34 CXC1250843_DB31XX_CS_LOADER_ACC_SDRAM_R2A055
LDR CAPS:SYSTEM FLASH
LDR:2008-01-28 16:36 CXC1250780_DB31XX_CS_LOADER_APP_SDRAM_R2A055
LDR CAPS:SYSTEM FLASH GDFS FILESYSTEM TA
Executing CSCA-based unlock.
SECURITY UNITS NOT PREPARED !Elapsed: 12 secs.
how to solutions?

Are you connecting the phone with 2+5?you must press C
Check the drivers also

Try to put the phone in flash mode with C.
Before doing any operation, it is always good to do an identify to create the security units backup.
Then check the correct options:
*Signed mode
*Perform Full Unlock