Starting a new page

Still having problems continuing the music. When I add enough measures for the second page it messed up the first page and doesn't start a new page. Changing the margins doesn't help as far as I can see.

I couldn't upload any pictures to show you due to the size limit imposed as there is no Save As picture support in Notation Composer which doesn't help. Basically, after adding the measures to the end of the score there are now 10 instead of 5 lines to a stave.