I love this table so far. Nice and sturdy. However, I can't get the leaf to pop up. I can only get the table to separate so far before it stops, but it looks like there isn't enough space for the leaf to come out. Both my husband and I have pulling on both ends of the table, but nothing. We don't have any instructions for this table. Can anyone tell me how this table is suppose to work? Am I just not pulling hard enough?