I am using Windows 7 Home Premium.  I have checked with Comcast and all settings to and from the Server are correct.  I have run the Windows repair for WLM, scanned the computer for viruses, etc., but still get the error message.  E-mails are going into my Comcast.net account, but not coming over into WLM.  Have also tried selecting and deselecting the "work offline" option.  No luck.  What's next???  Thanks.

I have now provided a copy of the error message I receive.