Cannot view page – error requring login/password

Hi there.

I had been working on a page for a while and was finally there. Published it and it went live….however when I tried to click into it via a different browser to check an error message appeared so when cancelling this came:

“Authorization Required

This server could not verify that you are authorized to access the document requested. Either you supplied the wrong credentials (e.g., bad password), or your browser doesn’t understand how to supply the credentials required.
Apache Server at selfishparker.com Port 80″

So I went back to the page editor and when trying to view from within the dashboard I couldn’t and another pop-up came said something along the lines of needing a secure username/password – which has never happened before.

Have I been hacked? Anyone else have this? Anyone have a solution?

Thanks in advance for your help.

Apache Server at selfishparker.com Port 80