LG 2-3G Tool v9.79 unable to unlock [Solved]

k300mm unable to unlock.

LG 2-3G Tool v9.79
supported models: 1710

Model: LG K300MM
Port: COM5
Operation: Direct Unlock

Checking Login and Password… OK
Ballance: 19 crd.
You have 19 credit(s) left. This operation takes 10 credits.Continue? Yes
Laf cmd info: send LAF_CMD_HELLO, retry #1
Laf cmd info: send LAF_CMD_HELLO, retry #2
Laf cmd info: send LAF_CMD_HELLO, retry #3
Laf cmd error: LAF_CMD_HELLO could not write.
Elapsed: 5 secs. –> (v9.79)

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