Thanks Wolfgang.

Hmm, your example work. 
But it does not if I include it my environment 

?

-a-


\startenvironment env_scMaterials\enableregime[utf]\mainlanguage[it]\setupinteraction[state=start]
%\setuppapersize[A5][A4, landscape]
%%%
%% the original format%\setuppapersize[A5][A5]
%% two pages side by side%\setuppapersize[A5][A4, landscape]%\setuparranging[2SIDE]

%% print:\setuppapersize[A5][A4, landscape]\setuparranging[2*2]  %% print in A4 double sided, cut pages and bind%% WHAT I HAVE ADDED \setuppagenumbering[alternative={singlesided,doublesided}]\setupbackgrounds[leftpage][leftframe=on]%% end print
\setupcolors[state=start]
%%%%%%%%%%%%%%% Colors %%%%%%%%%%%%%%%
%% SC colors %%\definecolor [SCwhite] [r=1.0, g=1.0, b=1.0] \definecolor [SCblack] [r=0.0, g=0.0, b=0.0] \definecolor [SCblue] [r=0.0, g=0.0, b=0.75] \definecolor [SCred] [r=0.75, g=0.0, b=0.0] 
\definecolor [SCgrey] [r=0.376, g=0.376, b=0.376] \definecolor [SCgreen] [r=0.0, g=0.45, b=0.0] %%%%%%%%%%%%
%% CIRMA colors %%\definecolor[cirmaBlue] [r=.0,g=.2,b=.6] %\definecolor[cirmaGrey] [r=.2,g=.2,b=.2] %lighter follows\definecolor[cirmaGrey] [r=.3,g=.3,b=.3] \definecolor[cirmaOrange] [r=1,g=.6,b=.0] % another grey\definecolor[bgGrey] [r=.9,g=.9,b=.9] %%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%



%% Define the color for bodyfont\definecolor [fontColor][black]
\setupfootertexts[{\color[cirmaBlue]\tfxx  Andrea Valle \hfill tSCIRMA }]\setuppagenumbering[location=footer, sectionnumber=yes, state=start]
\setupfooter[state=start]

\setuphead[chapter][style=\ss\tfc, before={\startframedtext[width=local, foregroundcolor=white, background=color, backgroundcolor=cirmaBlue, framecolor=cirmaOrange,offset=.25cm,rulethickness=0.05cm, frame=off, topframe=on,  bottomframe=on]},after={\stopframedtext\blank[.25\textheight]},]



\setuphead[section][style=\ss\tfb, before={\startframedtext[frame=off]\color[cirmaGrey]}, after={\color[cirmaBlue]\textrule\color[fontColor]\stopframedtext}]

\setuphead[subsection][style=\ss\tfb,before={\startframedtext[frame=off]\color[cirmaGrey]}, after={\color[cirmaOrange]\textrule\color[fontColor]\stopframedtext}]

\setupframedtexts[width=local, framecolor=cirmaOrange]
\setuplayout[marking=on, margin=0pt, width=fit]%[width=fit,%              rightmargin=1.5cm,%              leftmargin=1.5cm,%              leftmargindistance=0pt,%              rightmargindistance=0pt,%              height=fit, %              header=0pt, %              footer=20pt, %              topspace=1.5cm, %              backspace=1.5cm,%%              cutspace=1.5cm, %              bottomspace=8pt,%              location=singlesided]

%\setupfootertexts[{\color[blue]\tfxx  a.a. 2005-06 \hfill Andrea Valle \type{<}andrea.valle@unito.it\type{>} \hfill \currentdate}]
%\setupfooter[state=stop]
\setupcombinations[distance=5pt]
%\setupframed[frame=on,height=.9\textheight,width=.9\textwidth,top=\vss,bottom=\vss,align=right]
%%\setuplabels[]%\setupcaption[figure][number=no]
\definetypeface[tSCIRMA][rm][Xserif][Palatino]\definetypeface[tSCIRMA][tt][Xmono][LM Typewriter Regular]\definetypeface[tSCIRMA][ss][Xsans][Optima]
\setupbodyfont[tSCIRMA, 10pt]
%\setupbodyfont[sansserif]\setuptyping[color=black] %% redundant?

%%%% Some defs %%%%%%%%
\define[1]\Note{\blank{\tt [Lavori in corso:  #1]}\blank}\define[1]\Code{{\tt #1}}\define[1]\Line{\startnarrower\tfx\startlines\blank{\tt #1}\blank\stoplines\tfa\stopnarrower}\define[1]\Url{\startnarrower #1 \stopnarrower}%%%%%%\define[1]\Ex{\tfx \input code/#1 \tfa} % "code" folder is where you put the examples% code must be ascii and result from processing  % .sc files (ASCII, not rtf) in scToConTeXt.py % usage: \Ex{testSC}%%%%%%



% stolen from wiki
% different colors for frame in code and interpreter
\defineframedtext  [framedSC]  [framecolor=cirmaBlue,   strut=yes,   offset=2mm,   width=local,   align=right]
\definetyping[SC][option=commands,  tab=2,numbering=line, bodyfont=4pt, %% does not work: ?                    before={\startframedSC\tfx},                    after={\tfa\stopframedSC}]



\defineframedtext  [framedcode]  [framecolor=cirmaOrange,   strut=yes,   offset=2mm,   width=local,   align=right]
\definetyping[code][numbering=line,                    bodyfont=8pt,                    before={\startframedcode\tfx},                    after={\tfa\stopframedcode}]
\defineenumeration [Osservazione] [location=top, text=Osservazione, inbetween=\blank,after=\blank]   \stopenvironment 


--------------------------------------------------
Andrea Valle
--------------------------------------------------
CIRMA - DAMS
Universitā degli Studi di Torino
--------------------------------------------------


"
Think of it as seasoning
. noise [salt] is boring
. F(blah) [food without salt] can be boring
. F(noise, blah) can be really tasty
"
(Ken Perlin on noise)