Line width

[Walter Hofmeister]

Hello,
    I am trying to set the width of the lines of music that Lilypond
produces. I am sure that this has worked for me in previous versions but now
it seems to have no effect. The manual says:
 
"The most basic settings influencing the spacing are 'indent' and
'linewidth'. They are set in the \paper block. They control the indentation
of the first line of music, and the lengths of the lines."

There are no examples of these two parameters. The head of my .ly file looks
like this:

\version "2.2.0"
\include "english.ly"

\paper{
               
               indent = 5 \mm
               linewidth = 185 \mm
               interscoreline = 36 \pt
               pagenumber=no
             }


Does this look OK? Can anyone tell me what I am doing wrong? I have tried
numverous sizes and it has made no difference. I have checked several files
in the Mutopia folder that is installed with Lilypond and it appears that my
line is correct. Copying and pasting the line from other files has also
produced no change in the line width. Anybody?

Walter HOfmeister