Having a word in small capitals in a section title

[Charles de Miramon]

Hello,

I'm trying to get in a section title a word in small capitals. The LateX
code generated by LyX is :

\section{L'�laboration du concept de spiritualia dans la premi�re moiti� du
\noun{xii}\ieme\ si�cle}

but on the the DVI output, xii is still in roman and not in small capitals.
I'm using 
the Koma-Script Article Layout and sadly can't access to Herbert Voss
Website.

Cheers,
Charles