lg x190 unlock failed..need solution

Welcome to Octoplus/Octopus Box LG Software version 2.9.3
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Checking data...OK
Platform: LG MTK
Selected port: COM1
Selected baudrate: 921600
Selected model: X190
Selected USB connection type
Press and hold "Vol-" and connect cable.OK
Phone found.
CPU name: MT6592
CPU revision: 8A00.CA00.0000.0000
Prepairing loader...OK
Sending loader...OK
Synchronizing with loader...
Detecting flash chip...OK
Detecting EMMC flash chip...OK
Reading info...OK
Reconnecting phone...OK
Found model at port COM8
Port busy
Performed by 2.9.3 Software version.


always stuck in port busy