KP500 flash write problem

Code:

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Platform: LG Infineon

Selected port: USB

Selected model: KP500

Disconnect battery and connect USB cable to phone...

Reading info. Please wait...

Certificate load error

Reconnecting in safe mode...

Please reconnect USB cable...

This mode only supports firmware writing.

Please use COM Cable for unlocking.

Opening "KP500AT-00-V10f-EUR-XXX-OCT-23-2009+6.oct"...OK

Writing Firmware...

Certificate load error

Disconnect

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