More windows mail errors

(I'm getting the same error message: The connection to the server has
failed. Your IMAP command could not be sent to the server, dur to non-network
errors...blah blah blah. Heres' the thing... this all worked for 9 months or
so and then it just stopped! (Ihave plenty of memory on my harddrivem despite
the error message) I deleted the account through tools and then tried to set
it back up and I just keep getting this message. I have a netscape.net email
address that will either be "AIM" or "AOL", I honestly don't remember which,
though I think it's AIM. I've gone to the site and read their instructions
and it isn't working.