Redirection does not work

Hello,

Please help - our redirection stopped working some time ago. 
When you type  harrovians.org.uk/ into a browser it should redirect to  7749.toastmastersclubs.org/
but instead, it shows an error message:
"Refused to display ' 7749.toastmastersclubs.org/ ' in a frame because it set 'X-Frame-Options' to 'sameorigin'."

We have redirection set up with a domain provider (please see an attachment).

Could you please help?

Thank you in advance,
Gosia Witkowska - VPM
 

FTH does not support redirects or inclusion into iframe.
Please use the Supplied procedure for using a custom domain.