Unable to send or receive messages for the Hotmail.co (mmayr) account.

Server Error: 4102
Server: 'https://mail.services.live.com/DeltaSync_v2.0.0/Sync.aspx'
Windows Live Mail Error ID: 0x8DE00001

Please advise as to how to resolve,  I can see mails via www.hotmail.com, but not via windows live