Live display feature

First I want to say a big thank you for the software developer, I use more than a year and it really helped me resolve my problems with my network.

Now I have one feature request that such functions automatically ping to all hosts every number of seconds that we specify like Nirsoft Pinginfoview so we know it's in the dead host ato life,
I've tried to feature a live display but does not work, Can you explain it?

Once again I thank you

Yes, that's what the live display is for. What do you mean it does not work?

thanks for the quick response
so here's the problem after I scan my network, I now have the results of the scan and I save in the form of xml file, and then I closed the program then I reload my last scan but when I turn on the live display requires re-scan my network, but after I turn on the live disply feature does not work, also does not run when I just rescan the host computer
Live display feature only works if we scan over the network from ip range, but does not work when displaying the results of scanning the network

You need to specify that you want to rescan the computers listed in a file to engage the live display.