Norton internet security 2011 blocking email downloads through Outlook. Help?

Hi all --  Could use your help.

 

NIS 2011, running windows 7, and I download email through outlook.   Recently, outlook has been unable to download email from my email server through outlook.  I can send through outlook, and I can access my email through the webserver attached to my ISP, but I can't get NIS to allow email downloads through Outlook.  This problem started all of a sudden -- it was working perfectly right up until it stopped working.  Very frustrating.   Everything works when I uninstall NIS (but the problem persists if I simply turn off NIS, oddly).

 

I'd welcome some help.  The Norton help desk couldn't fix it.  They bumped me up to a supervisor (but after two hours of them working on the problem, I ran out of time.  will try again to call and get a supervisor tonight).  Do you have any suggestions in the meantime?  Becasue I'm at the point of going back to McAffee.  

 

I have no other protection or firewalls running, as far as I know.  

 

Thanks.

 

Donna