control point can't see MinimServer

[Terry]

Hi Simon
Thanks for your suggestions. I tried restarting network devices and disabling 5GHz band on BT HomeHub but it still doesn't work. However I have found that when I enter the IP address for MinimSever in the web browser it does not find anything.
I suspect (hope) the problem is with the way I've set up MinimServer (I'm not a computer whizz and have only relatively recently switched from a Windows PC to an iMac running OSX.
What puzzles me is that the previous version worked faultlessly on the iMac.
Thanks
Terry