Problems Logging In

I am currently running 5 different WordPress sites/blogs for clients and I find myself unable to log into any of them. When I try I’m getting a strange log in blog which pops up from the browser, rather than the usual WordPress log in window which says:

“A username and password are being requested by http://raeclimbsamountain.org.uk. The site says: “Automatic Protection – Username: protected Password: wordpress | Visit http://www.webhostingstatus.com for more info”

When I type the user name and password in i get:
“The user name or password you entered for this area on raeclimbsamountain.org.uk:80 was incorrect. Make sure you’re entering them correctly, and then try again.”

and a message telling me i don’t have authorisation. This happens on all 5 sites.