Contrary to what a reasonable person might assume, the sign-in prompt
when starting WLM has nothing to do with being able to send and receive
mail or even to get into the WLM program. To find out what this does,
use Help, View Help and search for "Signin".
As for checking your Tools, Accounts setting, make sure that the
password is correct. Clear the field and enter it again.
If that doesn't help, what version of Windows are you using and what
version of IE?
Mike - http://pages.prodigy.net/michael_santovec/techhelp.htm