n910v reactivation lock fail

sing Version...1.0.0.0066
Selected Port SAMSUNG Mobile USB Modem #12 COM2
Selected Model GT-I5503
Selected Task FRP/RLOCK Online

Searching phone...

Phone Found Wait...
fail to connect modem are you sure selected modem port??..
Fail to find phone on modem port...

!!! Fail !!!!
Restart Phone if not auto...
Total Time Take...00:00:03