Thanks for your help , not up with networking but it seems like I will need to be.
Running a gargoyle router system with every machine assigned a network address via dchp so am at a loss to why the issue
Just had a relook and it is definately shown in the gargoyle router as 192.186.1.106 as it is assigned a static ip via dhcp.
I started the media portal on the server and did a log.
Maybe I need to delete the homegroup and reassig it a new password ?.
Every mac address connected to the router is assigned a static ip as we are on a limited satelite internet and we limit each pc to 400mb per day.
ISSUE IS NOW FIXED thanks for a clue to what was going on.
I went into the tv server setup and changed the streaming server settings from auto to the static ip I assigned and it all started working again .
Kids are happy - missus not as unhappy , the world is all good again