When opening Live Mail a Windows Live Mail dialogue box appears on desk top “Sending email using ‘pop.pacbell.yahoo.com'”

This dialogue box also says "Not Connected". And, under the Tasks tab it shows "Send 1 messages(s) using 'pop.pacbell.yahoo.com' with Status Completed; Send 1 message(s) using 'pop.pacbell.yahoo.com' with Status Executing; and a third message that hasn't started yet waiting for the Executing message to complete. This message prevents me from opening Live Mail. This started yesterday afternoon after troubleshooting with AT&T about emails disappearing from Live Mail. It looks like something is "stuck" but I can figure out how to "unstick it". This morning the AT&T tech said I needed to talk to Microsoft about this. Thanks for any help you can offer.