I did a reinstall of linuxmce and everything is now up and running properly.
I think however the issue was caused by the HDHomerun obtaining a IP address from my ADSL model, and not from Linuxmce.
As soon as I plugged the HDHomerun into the network with the ADSL modem disconnected LinuxMCE picked it up straight away.
Sounds like you might not have the network configured correctly. You can't have 2 DHCP servers on the same network - this will screw lots of stuff up. See this chart (Network After LinuxMCE is Installed) for what it should look like:http://wiki.linuxmce.org/index.php/Network_Setup