IE 7.0 and sign-in

Now i know this is NOT the right forum to ask this question but it seems to
be a very big problem over at Windows/Internet Explorer/General Discussions
and mass confusion over why we have to sign-in everytime we leave MSN. I
can't seem to make head or tails of the answers being provided by the posts.
If i x out of MSN and pass my curser over the butterfly in the system tray it
says i'm signed-in, but when i click on it i have to sign-in again. The same
goes for the icon on my desktop, I've signed my password three dozens times
today alone. I don't know if i'm doing this by cleaning a cookie, or Windows
is not remembering my password, or this is the way IE 7.0 is going to be, but
if anyone has a clue of what is happening here i would love to read what you
have to say. Now signing in to Defender and everytime i return to MSN, pretty
soon i gonna hate seeing my own name. Is it me or is it IE 7.0 ? I'll read
anything - Thanks Ron