Windows lie err0r message

I keep getting the following error:

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

Server Error: 0x800488E5
Server: 'https://mail.services.live.com/DeltaSync_v2.0.0/Sync.aspx'
Windows Live Mail Error ID: 0x800488E5

and I have lost all my contacts.

HELP!!