How to set section numbering in [svmult]?

Question

In my book I have automatically-numbered chapters and sections but when I type

\chapter{CHAP 1}
\section{SEC 1}
\subsection{SUBSEC 1}
\subsection{SUBSEC 2}

I receive a chapter with number 1, section with number 1, and subsections with numbers 1.1 and 1.2 but I'd like to have chapter numbered 1, section numbered 1.1 and subsetions with numbers 1.1.1 and 1.1.2. Please, can anyone can help me ?

My code is below:

\documentclass[envcountresetchap]{svmult}
\usepackage{polski}

\usepackage{amsfonts}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{mathptmx}
\usepackage{helvet}
\usepackage{courier}
\usepackage{makeidx}
\usepackage{graphicx}
\usepackage{multicol}
\usepackage{footmisc}
\usepackage{subeqnarray}
\usepackage[T1]{fontenc}
\usepackage[latin2]{inputenc} 
\usepackage{fancyhdr}
\pagestyle{fancy}
\usepackage{rotating}
\usepackage{tikz}
\usepackage{float} %pakiet do obsługi obrazków
\usepackage{graphicx} %pakiet do dodawania obrazków
\usepackage{tabularx}
\usepackage{longtable}
\usepackage{booktabs}
\usepackage{tikz}
\usepackage{float}
\usepackage{hyperref} 
\hypersetup{colorlinks=true,
        linkcolor=blue,
        citecolor=blue,
        urlcolor=blue}


\title*{Title}


\begin{document}
\frontmatter
\maketitle

\preface
\lipsum

\tableofcontents

\mainmatter
\chapter{CHAP 1}
\section{SEC 1}

\subsection{SUBSEC 1}
\subsection{SUBSEC 2}

\end{document}

Answer 1

Add

\renewcommand\thesection{\thechapter.\arabic{section}}

to the preamble, after the titling information. A complete example:

\documentclass[envcountresetchap]{svmult}

\title*{Title}
\renewcommand\thesection{\thechapter.\arabic{section}}

\begin{document}

\chapter{Test chapter}
\section{Test section}
\subsection{Test subsection}
\subsection{Another test subsection}
\section{Another test section}
\subsection{Yet another test subsection}

\end{document}