I too had the problem where whenever I started WLM the ID and password fields
were blank. I tried the fix suggested here
http://messengergeek.spaces.live.com...y?sa=769848910 but it didn't fix the problem.
What fixed it for me was to completely remove WLM and reinstall WLM using
the following method.
1. Download and run ZapMessenger
http://messengergeek.spaces.live.com...DA1!1118.entry
2. Perform instructions 2 thru 6
http://messenger-support.spaces.live...3F!15378.entry


