K428 unlock fail

I successfully did two k428, but then when i tryed my number 3 k428, the process failed:

model:= LG-K428
LG TMB Unlocking Started...
SU Version..2.79:SUPERSU
Device is Secure Rooted..uid=0
Reading ASK Please Wait..
Please Wait while...
Please wait starting task...
Credits Left:= 26
Please Wait while...
Please wait starting task...
fail to read task result...
DBG...VYy5DcAwDANXoh46SWlF0v4jRS4Dgs3xQF0QeVAwLIQ3 AiVTg7krX1Nvb92Skn82fkHHBwSbwTpUEgeENpTJ5vyTjtne1S fcWbGtLdPqsuD9AQ==

!!! Fail !!!!
Restart Phone if not auto...
Total Time Take...00:00:09

Tryed again (now it ask me to select rpl file, did it but again fail:
Using Version...1.0.0.0056
Selected Model LG Android
Selected Task TMB Unlock(ADB)

Searching ADB device Please wait..
Device Detected...
SELinux := Permissive
model:= LG-K428
LG TMB Unlocking Started...
SU Version..2.79:SUPERSU
Device is Secure Rooted..uid=0
Please Wait while...
Please wait starting task...
fail to read task result...
DBG...VYxBEsAwCAK/pNJgczSJ/v9JNccOw4GFQR1iLwoGR3giUNYWleHgEXh66rJt+896X0DvFYL FYF1qu7NaaALcTPY/H9fuzsgrLiYe5iTc5qkzPg==

!!! Fail !!!!
Restart Phone if not auto...
Total Time Take...00:00:08