problem connecting D820

i have problem connecting this phone. i installed LG software from help box also usb debugging is on.

Welcome to Octoplus/Octopus Box LG Software version 1.8.0

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Platform: LG Qualcomm

Selected port: COM252

Selected model: D820

Reading info...Failed!

Could not detect mode!

via Welcome to gsm-tips http://forum.gsmhosting.com/vbb/f799/problem-connecting-d820-1897914/