Letter Opening ?

[Nicolas Ferre']

I try to write a simple letter using lyx1.2.3 (class/layout letter), but
it fails with the \opening stuff. The lyx error message means that
\opening is not recognized.
Actually, if I export my letter in tex, the \begin{letter} ...
\end{letter} does not appear !
Is there something that I missed (I'm sure this is the case) ?
Below are given a little lyx example and the corresponding tex code.
Thanks a lot,

Nicolas

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Nicolas FERRE' (PhD)
                                 phone/fax : +39-0577-234278
Dipartimento di Chimica
Universita` di Siena             mailto:[EMAIL PROTECTED]
via Aldo Moro
53100 SIENA (Italia)             http://ccmaol1.chim.unisi.it/
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

#LyX 1.2 created this file. For more info see http://www.lyx.org/
\lyxformat 220
\textclass letter
\language english
\inputencoding auto
\fontscheme default
\graphics default
\paperfontsize default
\spacing single 
\papersize Default
\paperpackage a4
\use_geometry 0
\use_amsmath 0
\use_natbib 0
\use_numerical_citations 0
\paperorientation portrait
\secnumdepth 3
\tocdepth 3
\paragraph_separation indent
\defskip medskip
\quotes_language english
\quotes_times 2
\papercolumns 1
\papersides 1
\paperpagestyle default

\layout My Address

Me
\newline 
Here
\layout Opening

Dear Dr.
\layout Standard

Bla Bla Bla
\layout Standard

Blo Blo Blo
\layout Closing

Best regards
\layout Signature

Me
\the_end

lettre.tex
Description: TeX document