header and footer in scrbook

header and footer in scrbook

I am having a problem with the scrbook class. Since I am quite new to it I
spent quite some time researching but somehow haven't found a way to
resolve it. I am trying to write a LaTeX document for uni and would like
to have headers and footers on each page. The essential lines in my
document are as follows:
\documentclass[10pt,twoside,a4paper,fleqn,ngerman]{scrbook}
\usepackage[utf8]{inputenc}
\usepackage[left=1cm,right=1cm,top=1cm,bottom=1cm, includeheadfoot]{geometry}
\usepackage[automark,headsepline]{scrpage2}
\deftripstyle{pagestyle}[0.5pt][0.3pt]{\pagemark}{}{\titleinfo}{\pagemark}{\today}{\authorinfo}
\pagestyle{pagestyle}
\newcommand{\titleinfo}{Model}
\newcommand{\authorinfo}{D. Wright}
\begin{document}
\chapter{Chapter}
\end{document}
Somehow it doesn't seem to work. I get the following output:
When I change the \documentclass to article or scrartcl I do get the
headers and footers on each page but not in book, or scrbook (which would
be the one that I would like to work with). Can anybody help me out?