What does that have to do with "CallingID"?
What exactly does the popup warning say? If there is a Cancel button,
click it, which should produce an error message. Right-click on your
error message, copy, then paste it into a reply here.
We can't do much troubleshooting without the complete error message.
--
Gary VanderMolen, MS-MVP (Mail)
"Bacisgirl" <(E-Mail Removed)> wrote in message news

D0E18DC-9602-4090-A019-(E-Mail Removed)...
>I am using Windows Mail in Vista and this popup warning is continually coming
> on, and mail will not download. What is this?