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Question: unable to reload my CNR-WCAM413G

I have a CNR-WCAM413G It initially loaded ok, but,when I cleaned my computer it somehow got wiped off and would not reload.the diac is put in it starts the process. I am then directed to plug in the device. All I get is the instruction to plug it in then nothing happens,its as though the computer cannot detect it.Any ideas would be very welcome