The steps for resolving the issue are
Go to the Remote control webif page and check that it controls the Humax
If it doesn't check that the Remote control mode on the Remote Settings page matches the mode in use by the real remote
Next try the "fix-flash-packages" diagnostics on the diagnostic page
If the remote package is working OK try rebuilding the DLNA data base Diag->DLNA Reset->Reset DLNA database
How do I access the remote control webif page? I can not see it in http://192.168.1.65/settings/settings.jim? Where else do I look for it?
I now realise that the webif page is the web interface ie http://192.168.1.65 in my case. It is not a submenu.