Many thanks for the feedback guys.
Alan - the app has been suspended from the apple app site so used Safari to get me to the Filmon website. Clicked on to the log on symbol and hit this problem which is a recurring problem. I have been in touch with the developer who advised me of the apps suspension due to further work on the app software and also have advised them of the logon problem and I am waiting for a reply to this issue.
Tom - did you mean "virtual private network"? Just tried this both on and off but unfortunately same problem.
Once again many thanks. I would welcome any other suggestions.