Windows live mail will not let me send emails using my Hotmail account, I see a lot of people are also having this problem but haven't really seen a solution.

This is the error I receive.

Unable to send or receive messages for the Hotmail.com (address removed) 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 'Invoice 00000397; From *address removed*'
Server Error: 4202
Windows Live Mail Error ID: 0x8DE00006

Hopefully someone can help me with this as I really need to send emails for my business.