URL invisible from just one computer on network

[dysong3]

I have just replaced my Apple Airport Extreme router for a new one with exactly the same configuration, however all of a sudden, one of the computers on my network can no longer see the URL of my Filemaker Server. So I can access my Filemaker server files from any computer anywhere, except for this one computer on my network.  And even from that one I can access them if I use the local URL (10.0.1.14) rather than the universal one.  It is invisible for both Filemaker client and IWP.  I have checked the firewall and the same ports are open all over my local network. Anyone have any ideas on what may be impeding this computer from seeing this URL?

[dysong3]

Would you believe that I only had to restart the computer, which I had neglected to do, to resolve this issue?