Transferring references from desktop to endnote web


I am trying to activate my endnote web account via Endnote preferences - activate, as I understand this is required before I can transfer my references from desktop to web.

When I click on ‘activate’ I get the following error message: ‘The page you are viewing is not a valid EndNote Web Registration Page.  If you entered a non-standard URL, please check it and try again’.

I have successfully registered with endnote web and that all seems to be working - so I don’t know what to do about the error message!

Many thanks