Help – WordPress requesting a ‘Magic’ password

Hi,
I am trying to update a page on my website. Everytime I click save draft or publish a message appears asking for a Authentication (this has never happened before). In the request it says ‘A username and password are being requested by http://www.alineplanning.org. The site says: “Magic”.

Has anyone esle had this problem? Is it a new wordpress feature?

I have typed in my password but it does not seem to work.

Just keeps saying access denied.

Thanks.