Vista - Hotmail "bottom" reading pane problem

When using Windows Live Hotmail and the "bottom" reading pane option chosen,
the messages list shows up but no message, not even when I (single) click on
the message.

The only way to open and read the actual message in the "bottom" reading
pane format is to double click the message and read it in full view.

This all happened when I accidentally fiddled with the divider between the
messages list and the reading pane (I believe this is the correct term?).
Maybe I double clicked the divider - or something - and then the divider
disappeared as did the option to view the message in the bottom half of the
reader pane.

When I choose the "right" reading pane option to view my messages,
everything works fine and there is a divider, a message list, and a viewable
message..

I cannot get back my divider or my right to view the selected email message
when the "bottom" reading pane option is selected without double-clicking it.

Please somebody help me! I'm frustrated and ready to throw my computer
through a window!!
--
Thank You!