Go into 'My Menu' -> 'My Stuff' -> 'Edit Preferences'.
On the page that opens up, ensure that your "Default Starting View" is set to "Traditional Forum View" and not "My Watch Lists"
Also: On whatever your main screen is, when viewing that Archives board, look above it, but at the far right.... if there is a yellow arrow pointing downward, click it. You may have simply collapsed the view of the main board and just need to open/expand it.
What it would look like collapsed:
larger view 
Versus (what you want to see):
larger view 
