# Subsection numbers with memoir + frontmatter

I've just tried to use \frontmatter with memoir class for the first time and everything works fine except for some weird detail. When I add \frontmatter and \mainmatter commands, the numbers of subsections disappear in the ToC and also in the subsection titles themselves. The code is the following:

...
\chapterstyle{veelo}
\setcounter{secnumdepth}{3}
...
\begin{document}
\frontmatter
\include{abstract}
\include{acknowledgement}
\setcounter{tocdepth}{2}
\tableofcontents
\include{chap0_intro}
\include{abbrev}
\mainmatter
\include{chap1_somi}
\include{chap2_simulation}
...


ToC looks like this:

Why and how can I get them back while keeping the matter-commands?

Sorry, I've found an answer to this question eventually: in the comment to https://tex.stackexchange.com/a/3329/3897: I should use \setcounter{maxsecnumdepth}{3}, not secnumdepth.
Or, even better, \setsecnumdepth{subsection} as said in https://tex.stackexchange.com/a/33458/3897.
• Actually the correct memoir command is: \setsecnumdepth{subsubsection}. – Alan Munn Jun 25 '12 at 19:12