Network Interface dropdown menu error

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In the "NetworkComms" component I´m trying to set the corresponding interface of my PC by the "Network Interface" dropdown menu.
It has worked once, and I got a right number and the PC´s IP. But after that, I´m getting just a half blank space rather then the expected interface numbers to make a choice. What could be wrong ? FC9 or Windows10 configuration ? Thank you.

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Just to show the issue by another perspective, I did the Wiki example Example Network Comms Web Server (below) in a new instance of FC9. Still got the half blank "Network Interface" field. So I can´t be able to visualize the PC´s interface numbers, and consequently determine the PC´s IP adress.
Please, any clue how overcome this situation ?

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If anybody had this issue, the clue is : just reinstall entire FC9 again, and you´ll get rid of that half blank field. That simple.