Position of link target from table of contents [closed]

Question

When I disable numbering of low level headers by set secnumdepth to 1, I get links from table of contents and bookmarks points to place under the header. The header doesn't display in this case, just a content. For watching header I must scroll up. This is my example:

\documentclass[a4paper,oneside]{book}
\usepackage[pdfborder={0 0 0}, breaklinks=true, pdftex=true]{hyperref}
\setcounter{tocdepth}{5}
\setcounter{secnumdepth}{1}
\begin{document}
 \tableofcontents
 \pagebreak
 \section{Sect1}
 \subsection{SubSect1.1}
 \subsubsection{Subsect1.1.1}
 Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.
\end{document}

Where is I am wrong? Thanks.