help me!!! Phone Only Vibrates (NOKIA N97-MINI)

I try to flash RM-612 on RM-655 based phone but Now i cannot roll back



Try to flash with latest RM-555 file but when It come to the line POOLING PHONE cannot find my phone





After that phone only VIBRATE





Please help me to have my phone working again...







anyone to know how to fix this

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