FC6 and Network

[Ferguson, Michael]

G'Day List,
 
I just loaded FC6 and like it much. I have a little problem that I cannot lick.
I have loaded earlier versions of FC plus RHES 3 and 4 and they all got on to my Win2K3 network with any problems.
 
This new FC6 install gets DHCP'd fine. 
ifconfig confirms that it got 192.168.131.66/255.255.248.0 however, I cannot ping any other IP addresses on the LAN.
I get a Destination Host Unreachable. Firewall is disabled. SELinux is disabled.
 
Did I miss something here? Any pointers will be much appreciated.
 
Thanks