When using Windows Live I keep getting a mesage that an email to a friend, Mike, that I tried to sent months ago cannot be sent:

                               Unable to send or receive messages for the Hotmail account. To send and receive messages in your Hotmail account, go to http://hotmail.live.com on the Web, or try again later. To get help from Windows Live Customer Support, go to http://support.live.com and click Windows Live Mail in the list of services.

Subject 'Mike in Boston'
Windows Live Mail Error ID: 0x80070057

For a while I was getting messages that no mail could be sent but I got a good reply regarding how to deal with this however I continue to get the above message. How do I deal with this?