Windows Live Mail

Hi I'm using Windows Live Mail 2012 as my email program. Lately I've had a recurring problem with the connection terminating. I get the following messages: 

The server did not respond to the IM command before the connection was terminated.

code 800cccde

or:

Your server has expectantly terminated the connection. Possible causes for this includes servers problems, network problems, or a long period of inactivity.

The last message I got said: it was a non network error

this is only happening with WLM, not when I'm browsing

I called my provider and they said it was the application that was a problem, not with their server. Can anyone give me an idea on how to solve this.

Many thanks

Diane