Authentication tab in local area network

Hi guys i need to enable IEEE 801.1x in my network and i cant see the Authentication tab in local area network any ideas?
My problem is:
I have 19 pcs in my bussines
I had made a ghost of pc-00 that is mine about 2-3 years ago.(The clients have new ghost(image)
Well i had a problem with my head pc and i had to load this image
But now i cant see any pc in my network places and in BeepFreeze console
I can ping any pc in the network from pc-00 but i cant ping the pc-00 from the other computers
any ideas?
Answer #1
Anyone can help my friend lost here we are in the same net and we need a little help
Answer #2
Hello,
are the computers in workgroup or in domain ?
what is the result of your ping ( when you ping from others computer to pc-00 )
see the firewall of your computer turn it off and then try to ping see the subnet mask if its the same like other computers
Answer #3
I fixed the problem with shared harddisks in pc-00
But i still havent figure out why i cant see in deepfreeze console the computers