Unwanted line/page breaks

[Jogchum Reitsma]

Hi,

I want to control the line/page breaking in setting the score of the Ave 
Maria from Josquin. To that end, I add \pagebreaks in the score.

Page breaks do occur indeed on those places, but also in between, where 
I don't want them.

Following suggestions ginven in this list to users with more or less 
similar wishes, I added to lines to the \score part:

\score {
  \new ChoirStaff <<
  \override NonMusicalPaperColumn.page-break-permission = ##f
  \override NonMusicalPaperColumn.line-break-permission = ##f

and two to the \page part:

 \noPageBreak
 \noBreak

But all this doesn't change a thing...

Anyone who knows how I can achieve the effect wanted?

cheers, Jogchum