Problem:
You can't log In, page just reads "Welcome Guest" after each attempt to log
in, instead of "Logged in as: user name". Solution:
Just delete your cookies and internet files
From Internet Explorer's Tool Bar, "Tools >> Internet Options >> Delete
Cookies..."
and:
"Tools >> Internet Options >> Delete Files..." (also check "Delete All Offline Content"):
Close all open IE and restart.
Now you should be good to go.
Thanks to KD6AAJ.