No server found al tratar de liberar un K510

Tengo un K510 y trato de liberarlo y siempre me da este error me tiene algo confuso
quien me podria ayudar

Código:

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v0.915XXX/UNI
CARD SERIAL: 00090651
Loaded 51 flash descriptors
FILE RECOGNIZED AS CUSTOMIZATION PACKAGE.
 
MODEL:CLEO/DORIS
CDA: CDA102459/107
CDA REV: R3A
VARIANT:AMERICA_2
LANGUAGE: EN PB XL
 
SIGNED MODE (USING SERVER)
No server found.
CARD COUNTERS: FLASH 20, UNLOCK 4
Elapsed: 3 secs.
SIGNED MODE (USING SERVER)
ALTERNATIVE SECURITY BYPASS ENABLED.
ChipID:8040,EMP protocol:0301
NEW SECURITY (MARITA RESPIN) PHONE
 
PHONE STATE: "RETAIL"
FLASH CID: 0050
Speed:921600
Flash ID check:897E
Flash props sent ok
OTP: LOCKED:1 CID:50 PAF:1 IMEI:35839701040613 CERT:RED
FLASH CID:50 COLOR:RED
 
Model:K510i
Brand:Digitel (TIM)
MAPP CXC article: R4EA031    prgCXC1250231_GENERIC_CO
MAPP CXC version: R4EA031
Language Package:AMERICA_2
CDA article: CDA102460/154
CDA version: R4A
Default article: cxc1250246
Default version: R4EA031
PROVIDER: 000-00
Network LOCKED
 
USERCODE:0000
 
RESTORATION FILE PRESENT FOR DETECTED FIRMWARE
 
Elapsed: 13 secs.
SIGNED MODE (USING SERVER)
ALTERNATIVE SECURITY BYPASS ENABLED.
ChipID:8040,EMP protocol:0301
NEW SECURITY (MARITA RESPIN) PHONE
 
PHONE STATE: "RETAIL"
FLASH CID: 0050
Speed:921600
OTP: LOCKED:1 CID:50 PAF:1 IMEI:35839701040613 CERT:RED
LDR:060712 1520 HAN_DB2012_FLASHLOADER_R1A002_CXC1250695
Flash ID check:897E
Flash props sent ok
bypassing security...
server step1 error:No server found.
unlock failed, that is fatal
Elapsed: 9 secs.
SIGNED MODE (USING SERVER)
ALTERNATIVE SECURITY BYPASS ENABLED.
ChipID:8040,EMP protocol:0301
NEW SECURITY (MARITA RESPIN) PHONE
 
PHONE STATE: "RETAIL"
FLASH CID: 0050
Speed:921600
OTP: LOCKED:1 CID:50 PAF:1 IMEI:35839701040613 CERT:RED
LDR:060712 1520 HAN_DB2012_FLASHLOADER_R1A002_CXC1250695
Flash ID check:897E
Flash props sent ok
bypassing security...
server step1 error:No server found.
unlock failed, that is fatal
Elapsed: 7 secs.

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En Settings marca Signed mode, enable alternative security bypass , enable preloader security bypass y click en unlock /repair

Saludos.

El error es porque te falta marcar preloader security bypass...(necesario para CID50 y 51)
Porque al no marcarlo se intenta liberar por servidor el equipo

Saludos