"Unknown Host" Bukkit 1.7.10

"Unknown Host" Bukkit 1.7.10 - Brown Wooden Blocks on White Table

I am trying to host a Bukkit Server over a LAN wifi network at a Library that I work at for 16 kids to play on. In the past when I was using an older Windows 7 computer I could host it fine and they could connect without issues.

But recently I tried to run it on a newer Windows 8 computer with more RAM and they all keep getting the "Unknown Host" issue. I made sure to get the IPv4 address from ipconfig and not to copy/paste it in. I've tried multiple times with no luck. I also disabled the firewalls and antivirus just in case they were causing the issue.

Any ideas?

Bukkit.yml

server.properties






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