Are you working within a table cell? If so the Row need the attribute "Allow
row to break across pages" applied, this is found under Table Properties, Row.
If you are working in a normal texting area and not a table, there was a
previously known problem which sounds like this but for page 1 and not pages
beyond that. The solution was to go to Format | Columns and click on the
preset picture for One (even if it already appears to be selected), then OK.
Also, knowing which version of Word you are using often helps.
Hope this helps
DeanH